Technical characteristics of BF-888S: frequency range: 400-470 MHz transmitter output power: <5 Watt number of channels: 16 supply voltage: 3.7 Dimensions: 115 * 60 * 33 mm walkie-talkie weight 149 g audio receiver power: 0.5 W receiver sensitivity: no worse than 0.15 μSelectivity in the adjacent channel: more than 65 dB spurious emissions: not higher than 60 dB presence of CTCSS and DCS: Yes