HandheldRadioSingleBandFactory 2018 Two Way Radios Long Range Walkie Talkies for Adults, 16-Channel UHF 400-470MHZ, for School Church Restaurant Hard walkie talkie shell: Even if your radio is accidentally dropped from a high place, the walkie-talkie is not easy to break, so you can use it in some construction sites or harsh environments. When we conduct a call test along the coast and seaside, it can reach about 3 miles without any obstacles such as tall buildings or other mountains. Near the center of many tall buildings in the city, it can reach about 0.6 miles. So the actual communication distance depends on the obstructions of the terrain environment where you are using the call. Suitable for Various Occasions: Suitable for business like hotels, restaurants, construction sites, factories, warehouse, school, retail shop, and various events like camp, Christmas and other presentation, running and bicycling events, school event coordination etc. Product Parameters Frequency Range400-470 MHZ Rated VoltageDC3.7V Rechargeable Lithium Battery Antenna ConfigurationGlue Antenna Antenna Impedance50惟 Way of WorkingSame Frequency Single Common or Different Frequency Simplex Grounding MethodNegative Electrode Volume116mm*60mm*37mm Launch Part Output Power5W FM ModulationFM Maximum Frequency Offset鈮ぢ?KH: Residual Wave Radiation-60 dB Pre-emphasis Feature6DB Per Octave Emission Current鈮?500M Receiving Part Sensitivity0.16u\(12dB Sinad) Squelch Sensitivity0.2uV Intermodulation Anti-interference50 dB Audio Power鈮?00MW Receive Current鈮?00MA Squelch Waiting10mAHandheldRadioSingleBandFactory website:http://www.sifang-radios.com/two-way-radios/handheld-radio-single-band/