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Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...
In April 2016, DeWalt created an Android-powered smartphone designed for building industry workers. It costs £379 ($544), is designed to survive a 2 m (6 ft 7 in) drop onto concrete, and has an operating range of −20 to 60 °C (−4 to 140 °F). [9]
Vehicular 5-watt short-range AN/MRC-145: Vehicular 50-watt radio system with two RT-1523s and a HMMWV assigned to the system AN/VRC-88: Vehicular 5-watt short-range dismountable – with manpack accessories AN/VRC-89: Vehicular 50-watt long-range/short-range AN/VRC-90: Vehicular 50-watt long-range AN/VRC-91
GMRS radios are typically handheld portable (walkie-talkies) much like Family Radio Service (FRS) radios, and they share a frequency band with FRS near 462 and 467 MHz. Mobile and base station -style radios are available as well, but these are normally commercial UHF radios as often used in the public service and commercial land mobile bands.
The old specification was often used in false advertising by some manufacturers who would claim their CB radios had "5 watts" long after the specification had changed to 4 watts output. The older 23 channel radios built under the old specifications typically had an output of around 3.5 to 3.8 watts output when measured at the antenna connector.
Withstand a drop of 1 meter on a hard surface; Watertight to a depth of 1 meter for 5 minutes; Power Minimum of 0.25 watts [citation needed] A power reduction switch to less than 1 watt must be available where power exceeds 1 watt; Antenna must be vertically polarized and omni-directional; Battery power capacity for 8 hours on a 1:9 duty cycle [1]
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