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The radio station of personal use "Signal-402" was produced since 1994 by the Novosibirsk plant "Electrosignal". "Signal-402" is a shock-resistant simplex FM radio station of VHF range, designed for two-way, non-searching and non-tunable radio communication with similar wearable, portable and stationary radio stations. The radio station operates in one or two-frequency simplex, provides the transmission of one of the four tonal call frequencies, either without a call, indication of the dialed channel and radiated power in the transmission mode, indication of the battery discharge. The radio station has 10 fixed communication channels, randomly selected in one of the frequency ranges: 144 ... 149; 151 ... 157; 162 ... 168 and 168 ... 174 MHz with a 25 kHz grid. The working frequency for any of the channels can be programmed using a computer. Sensitivity 0.35 µV. Output power 0.3 - 0.7 -1, 3 and 2.3 watts. Powered by a built-in battery voltage of 7.2 V and a capacity of 1.3 A / h. Dimensions - 170x72x43 mm; weight not more than 0.5 kg.