The BF-888S is a full featured two way radio and hand held transceiver with long range capabilities up to 6km. Each radio comes with a charger, antenna, and everything you need to get started communicating conveniently at a long range, whether in a recreational context like camping or on site at your business. Specifications - Frequency Range: UHF 400-470MHz. - RF Rated Power: 5W. - Channel Spacing: 25KHz. - Operated Voltage: 3.7V. - Battery: 1500MAh Li-ion. - Battery Life: About 8 hours. - Frequency Stability: 2.5ppm. - Operated Temperature: -30°c-+60°c. - Antenna Impedance: 50. How far can this radio be connected - Communication Range: about 2-4km. Functions - 16 Channel.