• Visual Communication Design: An Introduction to Design Concepts in Everyday Experience (Required Reading Range)

    Where do design principles come from? Are they abstract "rules" established by professionals or do they have roots in human experience? And if we encounter these visual phenomena in our everyday lives, how do designers use them to attract our attention, orient our behavior, and create compelling and memorable communication that stands out among the thousands of messages we confront each day? Today's work in visual communication design shifts emphasis from simply designing objects to designing experiences; to crafting form that acknowledges cognitive and cultural influences on interpretation. I... [Read More]

    • GXT1000VP4, 50 Channel GMRS Two-Way Radio - Up to 36 Mile Range Walkie Talkie, 142 Privacy Codes, Waterproof, NOAA Weather Scan + Alert (Pair Pack) (Black/Silver)

        • 2-WAY RADIOS - These walkie-talkies feature 50 GMRS (General Mobile Radio Service) channels, along with channel scan to check for activity. The JIS4 Waterproof Protection prevents splashing water from having
        • 36-MILE RANGE - Longer range communication in open areas with little or no obstruction. Easy Voice and Sound Activation Transmission (eVOX) with 9 sensitivity levels for hands-free
        • 142 CTCSS/DCS PRIVACY CODES - The privacy codes give you up to 3,124 channel options to block other
        • NOAA WEATHER SCAN + ALERT - NOAA Weather Scan will automatically scan through 10 available weather (WX) band channels and locks onto the strongest weather channel to alert you of
        • INCLUDED IN THE BOX: Radios (x2), rechargeable battery packs (x2), boom mic headsets (x2), belt clips (x2), 120V dual desktop charger, AC adapter, DC adapter, and an owner's

    • Wuloo Intercoms Wireless for Home 1 Mile Range 22 Channel 100 Digital Code Display Screen, Wireless Intercom System for Home House Business Office, Room to Room Intercom Communication(3Stations Black)

      Wuloo Intercoms Wireless for Home 1 Mile Range 22 Channel 100 Digital Code Display Screen, Wireless Intercom System for Home House Business Office, Room to Room Intercom Communication Specifications Long Rang: 1 Mile (3280 Feet) Multi-Channel: 01 - 22 Channel Monitor Time: 10 Hours (Automatically disconnect in 10 hours) Frequency Range: 462 - 468 MHz Digital Code: 00 - 99 Power Port: AC adapter 5V - 1A Size: 6.4 * 4.3 * 1.6 inch Note: This set can be expanded communication stations without limit. Features 1. Added display and power switch, make it easier to use. 2.The display of wireless int... [Read More]

        • [ Excellent Signal ] Clear sound quality and long range. An enhanced signal with 5280 feet range helps ensure crisp sound quality. The most trusted wireless intercom system for
        • [ 22 Channel and 100 Digital Code] 22 channels and 100 digital codes in a secure wireless intercom system. Features an enhanced anti-interference and can work with other intercoms with
        • [ 100% Satisfaction Guaranteed ] Love it or your money back! We provide a lifetime warranty for our intercom. Please feel free to contact us if you have any questions
        • [ Easy to Use with Detailed Manual ] Features include Monitor, Talk, VOX (Voice Operated Exchange), Group, and Calling function. Increase/lower volume, power switch, display screen too! This intercom system
        • [ Supported by Power Bank for Outdoor ] This device is compatible with Power Bank (5V 1A) making it easy to take these intercoms any place you want. Besides, it

    • NERF 37756 10 Mile Walkie Talkie Set, Delivers Transmission with 10 Mile Communication Range, Flexible Saftey Antenna and Morse Code with On/Off Switch, Orange and Black

      Use the two Nerf walkie talkies to communicate with your friends up to one thousand feet away. This warlike talkie set is great for trips to the park, playing in the woods, camping, or anywhere you want to keep in touch while playing. The extensive listening range makes it great for outdoor play and perfect for your next adventure. A Morse code button on the front lets you communicate when you can't (or don't want to) speak.

        • Comes with 2 walkie talkies; one for you and another for a
        • Backed by a 1-year warranty
        • Delivers high quality transmission despite
        • Impressive 10 mile communication
        • Signature blue and orange colors with a rugged sports

    • VTech DM221 Audio Baby Monitor with up to 1,000 ft of Range, Vibrating Sound-Alert, Talk Back Intercom & Night Light Loop

      The VTech DM221 Digital Audio Monitor with DECT 6.0 digital technology provides crystal clear transmission, eliminating the annoying white noise you hear from analog monitors. The only sounds you hear are coming from your baby. Totally digital transmission eliminates background noise and prevents interference so you can rest assured the only sounds you—and only you—will hear are your baby's. Make sure the Baby Unit is turned on. Move the Parent Unit closer to the Baby Unit, but not closer than 1 meter / 3 feet. If you are using the Parent Unit in cordless mode, the battery may be low and r... [Read More]

        • Follow the user manual for a better understanding of
        • This configuration includes one parent unit (monitor) and one baby unit (audio
        • DECT 6.0 provides crystal clear transmission, eliminating the annoying white noise you hear from analog
        • 5-level sound indicator - graphic bars on the parent unit indicate the level of sound in your baby's room so you can visually monitor the noise level with the unit
        • Sometimes all your baby needs is to hear the sound of your voice - comfort your infant with the 2-way talk-back
        • Rechargeable batteries provide the parent unit with up to 18 hours of monitoring time on a single charge, or use two AAA batteries (not
        • Go hands free with the belt clip on the parent unit - carry the parent unit everywhere you go without the hassle of holding it. The operating range of the
        • Parent unit can be set to beep if: (1) link between the parent unit and the baby unit is lost, and/or (2) rechargeable battery is
        • Language is preset to English, but can be switched to French or Spanish for all screen
        • The loop on the baby unit doubles as a soothing night light for your little
        • Vibrating sound-alert on the parent unit - enjoy some added peace by being silently alerted when there is sound in your baby's

    • Retevis RT21 Two Way Radio Rechargeable 2 Way Radios UHF FRS VOX Emergency Security Long Range Walkie Talkies with Secret Service Earpiece (10 Pack)

      Retevis RT21 is the enhanced version of the usual radiosRT21 have the big body than the others,so that take it outside and no worry about the fall apart.RT21 have the high-gain antenna,not need to order the replacement because worry it will fell apart.RT21 have the solid shell and belt,not worry the belt broken so that walkie talkie falls.RT21 have the superior cell and keep great transmission for a long time using.The Private code feature provides enhanced security for your important public safety and private security communications. Suitable for hotels, restaurants, construction sites, facto... [Read More]

        • Solid build portable walkie talkies; quality body and rotate button can withstand long time use and collision saving much money in the long
        • Good reception and crystal transmission sound; Strong penetration and audio keep you and your team always stay in contact with loud clarity sound quality in building or
        • Keep away from the irrelevant call and private team conversation; Private code function will shield other people chatter and ensure you and your team have quiet and private
        • Superior accessories; Coming with the " secret service " ear tubes help you keep clear call in noisy environment; durable belt clip and hand strap is convenient to carry; The
        • 2 year warranty and 30 days no reason to return; no matter any reason within 30 days you can apply for a return including the radio

    • 3M Peltor TacticalPro Communications Headset MT15H7F SV, Hearing Protection, Ear Protection, NRR 26 dB Excellent for heavy equipment operators, airport workers, shooting and industrial workers

      The 3M Peltor TACTICALPro folding headband model headset allows for clear, ambient sound and voice recognition in noisy environments. The headset is designed with a unique frequency response that amplifies low-level sounds while suppressing dangerous impulse noises. It is the perfect choice for a wide variety of applications, including: gun ranges; fork lift drivers; airport ground personnel; maintenance mechanics; and industrial workers. This 2-way communication headset features: (bul) Noise Reduction Rating 26 dB (bul) Combination liquid- and gel-filled ear cushions (bul) Omni-directional ... [Read More]

        • Amplifies low-level sounds while suppressing dangerous impulse
        • Protects hearing with a Noise Reduction Rating of 26
        • Offers clear, ambient sound and voice recognition in noisy
        • Ability to be used with portable
        • Uses deep earcup design and soft ear cushions for all-day

    • Design and Development of Underwater Acoustic Modem for Shallow Waters and Short Range Communication

      Design and Development of Underwater Acoustic Modem for Shallow Waters and Short Range Communication

        Master's Thesis from the year 2014 in the subject Engineering - Naval Engineering, Ocean Engineering, course: Electronics Systems Design, language: English, abstract: The existing underwater acoustic modems are designed for deep oceans and long range comm

    • Zimtown 4 Piece Baofeng BF-888S Long Range Walkie Talkie Two-Way Radio Communication

      Introductions:Thanks for your attention. Here we are going to introduce this BF-888S 5W 400-470MHz 16-CH Handheld Walkie Talkie to you. This wired handheld walkie talkie can work well at anytime and anywhere. With simple and elegant design, it can be used on many occasions, such as airports, manufacturing plants, concerts, etc. In addition, this walkie talkie can convey you sound to others clearly and loudly. With this interphone, you can communicate with your partners or workmates much more conveniently. It is a great assistant for you. You cannot miss it.Features:1. It is a lightweight and compact communication device2. It can be used to keep communication with partners or workmates3. It can be used on many occasions such as airports, manufacturing plants, concerts, etc4. Provide you clear and loud sound5. Protect sound from the interface of signal6. New and high-quality7. It features hand-held design, which is convenient to useSpecifications:1. Color: Black 2. Brand: Baofeng 3. Model: BF-888S4. Quantity: 1 Piece5. Material: ABS 6. Frequency Range: 400-470 MHz7. RF Output Power: 5W8. Channel: 169. Talk Range: 5-10 km10. Battery Type: Lithium Battery11. Battery Capacity: 2800 mAh 12. Standby Time: 50 Hour 13. Working Time: 40 - 48 Hour14. Battery Life Theory: 10000 Hour15. Monitor Function: Yes16. Weight: 21.45oz / 608g17. Operating Voltage: 3.7V18. Frequency Stability: 2.5 ppm19. Dimensions: (4.72 x 2.17 x 0.79)" / (12 x 5.5 x 2)cm (L x W x H)Package Includes:4 x Walkie Talkies 4 x Antennas 4 x 110~240V US Plug Power Adapters (110cm) 4 x User Manuals4 x 2800mAh Batteries4 x Straps4 x Belt Clips4 x Earphone

        A lightweight and compact communication deviceProvide you clear and loud soundCan be used to keep communication with partners or workmates

    • Metra Amplified Rubber Roof Mount Antenna - Range - Am, Fm - Radio Communication, Vehicle - Black - Roof-mountable (44-ua44)

      Metra Amplified Rubber Roof Mount Antenna - Range - Am, Fm - Radio Communication, Vehicle - Black - Roof-mountable (44-ua44)

        Technical InformationFrequency Band Type: AM, FMPhysical CharacteristicsColor: BlackForm Factor: Roof-mountableMiscellaneousApplication/Usage: Radio Communication, VehiclePackage Contents: Amplified Rubber Roof Mount Antenna17 Feet Coaxial CablePower Supply WireCompatibility: Vehicles: Chevrolet Cruze 2011-2013Hyundai Elantra GT 2013Hyundai Elantra 2011-2013Hyundai Veloster 2012-2013WarrantyLimited Warranty: 1 Year

    • Metra Antenna - Range - Am, Fm - Radio Communication - Black - Roof-mountable (44-ua40)

      European Amplified Roof Antenna for AM/FM Bands15-Inch Black Helical Wind Removable Fiberglass Mast6-Inch Coaxial Cable (Power Through Wire)

        Technical InformationFrequency Band Type: AM, FMPhysical CharacteristicsColor: BlackHeight: 15"Form Factor: Roof-mountableMiscellaneousApplication/Usage: Radio CommunicationWarrantyLimited Warranty: 1 Year

    • Metra Amplified Rubber Roof Mount Antenna - Range - Am, Fm - Radio Communication, Vehicle - Black - Roof-mountable (44-ua42)

      AMPLIFIEDROOFATENNAFORAM/FMBRANDSINCLUDES17FEETCOAXIALCABLEANDPOWERSUPPLYWIRE3/4INCHHOLEREQUIREDAmplified Roof Mount AntennaAM/FM AntennaPackage Contents: Amplified Rubber Roof Mount Antenna 17 Feet Coaxial Cable Power Supply Wire

        Technical InformationFrequency Band Type: AM, FMPhysical CharacteristicsColor: BlackForm Factor: Roof-mountableMiscellaneousApplication/Usage: Radio Communication, VehiclePackage Contents: Amplified Rubber Roof Mount Antenna17 Feet Coaxial CablePower Supply WireWarrantyLimited Warranty: 1 Year

    • Metra Rubber Antenna 1 Inch Top Mount - Range - Am, Fm - Vehicle, Radio Communication - Black - Roof/mast (44-ut03r)

      Universal Rubber Replacement Antenna for AM/FM BandsTop Mount for 1-Inch Hole14-Inch Removable Black Conductive Rubber Mast54-Inch Cable

        Technical InformationFrequency Band Type: AM, FMPhysical CharacteristicsColor: BlackHeight: 14"Form Factor: Roof/MastWeight (Approximate): 5.60 ozMiscellaneousApplication/Usage: Vehicle, Radio CommunicationWarrantyLimited Warranty: 1 Year

    • Metra Rubber Antenna 1in Top Side Mount - Range - Am, Fm - Radio Communication - Black - Mast (44-us03r)

      Top or side mount rubber antenna split ball for 1in/25mm hole.14in/36mm removable black conductive rubber mast.54in/137cm cable.This antenna is designed for optimum performance for either am or fm bands.

        Top or side mount rubber antenna split ball for 1in/25mm hole.14in/36mm removable black conductive rubber mast.54in/137cm cable.This antenna is designed for optimum performance for either am or fm bands.Technical InformationFrequency Band Type: AM, FMPhysical CharacteristicsColor: BlackHeight: 14"Form Factor: MastMiscellaneousApplication/Usage: Radio Communication

    • 2 in 1 Multi-functional 20MHz 80MS/s Handheld Digital Storage Oscilloscope DSO Scope Meter True RMS Multimeter Auto/Manual Range with USB Communication Function

      This handheld instrument combines a 20MHz, single-channel, digital oscilloscope for viewing electrical signals with a manual/auto range digital multimeter for measuring AC voltage to 750V and DC voltage to 1000V, AC/DC current to 20A, resistance to 40MΩ, and capacitance to 100μF. The oscilloscope has maximum real-time sampling rate of 80MS/s and record length of 12.8div. The multimeter has two ranging modes: manual--allows the user to select the operating range; and auto--automatically selects the appropriate operating range. With USB port, user can start the communication between the meter and PC and upload all data or waveform to PC. Features:Professional digital oscilloscope with 1CH, 80MS/s Max. sampling rate and 20MHz bandwidth.Digital multimeter functions include True RMS DC/AC voltage/current, resistance, capacitance, frequency, duty cycle, diode and continuity test.3.3 Inch large LCD display with white LED backlight, easy and clear for reading.  Full auto set up for volt/div and time/div of DSO.DSO Trigger modes: Automatic, Normal, Single.DSO Auto Measurement: Vpp, Vavg, Vrms, dBm.DSO Cursor readout: dV, dt, 1/dt(frequency).Screen hold function.Save and recall up to 100 groups of waveform and data.  User can start the communication between the meter and PC via USB interface.Auto power off: 5~60 minutes adjustable.   Built-in 3.7V 800mAh Li-ion battery(included), convenient for use and charging.Comes with a protective soft shell, providing good protection for the instrument.Specifications:Digital Storage Oscilloscope:Bandwidth: DC~20MHz(50mV/div ~ 10V/div)Max. Real-time Sampling Rate: 80MS/sVertical Resolution: 8 bitsNonlinearity: ±1 bitChannel: 1 ChannelCoupling: DC/AC/GNDInput Impedance: about 10MΩIndexing: Vertical ±4.8, Horizontal 12.8Vertical Amplitude : 50mV/div ~ 200V/divWhen Range: 0.20μs/div ~ 20s/divVertical Amplitude : ±(5%+ 0.1div)Accuracy: ±(0.01% + 0.1div)Automatic Reference: In DC/dB MeasurementScanning Mode: Auto / Normal / SingleTrigger Level: ±12div (At each step, 0.1div)Trigger Slope: Rising along/down alongTrigger Position Adjustment: ±6div (At each step, 0.1div)Automatic Settings: When the vertical amplitude and automatic settingsThe Cursor Measurement Function: dV, dt, 1/dt (Frequency)Automatic Measurement Function: Vpp, Vavg, Vrms, dBmAutomatic Measurement Accuracy: ±(5%+ 0.1div)Record Length: 12.8divDigital Multimeter: Multimeter Display: 4000 CountsDC Voltage: 400.0mV/4.000V/40.00V/400.0V/1000VAC Voltage(True RMS): 400.0mV/4.000V/40.00V/400.0V/750VVoltage Resolution: 0.1mV/1mV/10mV/100mV/1VDC Current: 40.00mA/400.0mA/4.000A/20.00AAC Current: 40.00mA/400.0mA/4.000A/20.00ACurrent Resolution: 10μA/100μA/1mA/10mAResistance Range: 400.0Ω/4.000kΩ/40.00kΩ/400.0kΩ/4.000MΩ/40.00MΩResistance Resolution: 0.1Ω/1Ω/10Ω/100Ω/1kΩ/10kΩCapacitance Range: 51.20nF/512.0nF/5.120μF/51.20μF/100.0μFCapacitance Resolution: 1pF/10pF/100pF/1nF/10nFFrequency Counter: 5.12Hz~5.12MHz  0.1Hz~1KHzDuty Cycle: 0.1~99.9%Diode: Open Circuit Voltage 1.5V, Max. Current about 1.5mAContinuity: Sound when lower than 30ΩAuto Range: For every functionGeneral Specifications:Charging Plug: / (Optional)Input Voltage: AC 100~240V 50/60HzOutput: DC 5V, 1500mADisplay: 128 * 128 pixel graphic LCDBacklight: White LEDPower Supply: Built-in 3.7V 800mAh Li-ion Battery(Included) or AC AdapterCh

        3.3 Inch large LCD display with white LED backlight, easy and clear for reading.Full auto set up for volt/div and time/div of DSO.Professional digital oscilloscope with 1CH, 80MS/s Max. sampling rate and 20MHz bandwidth.Digital multimeter functions include True RMS DC/AC voltage/current, resistance, capacitance, frequency, duty cycle, diode and continuity test.DSO Trigger modes: Automatic, Normal, Single.