Features: Frequency: 400-469.995MHz 16 channel 1500mAh Li-ion battery 50 CTCSS/105 CDCS Voice Prompt PC Programming Emergency Alarm Intelligent Charging Battery Save Low Voltage Alert Time-out Timer FlashLight Specifications Frequency Range UHF 400-470MHz RF Rated Power 5W Channel Capacity 16 Channel Spacing 25KHz Operated Voltage 3.7 V Battery 1500MAh Li-ion Battery Life About 8 hours Frequency Stability 2.5ppm Operated Temperature -30c-+60c Antenna Impedance 50 Dimensions (L—W—H) (with battery,without antenna) 110 mm—50 mm—32 mm Weight (with battery/antenna) 198g Communication Range about 2-4km Transmitter RF Power Output 3W Modulation F3E Spurious Emission 65dB FM Noise -45dB(W) -40dB (N) Audio Distortion 5% Transmitting Current 1.3A Receiver Sensitivity (12dB SINAD) 0.20 uV Selectivity 55dB/50dB Intermodulation 65dB Adjacent Channel Selectivity 60dB Spurious Response 60dB Audio Power Output 1000mW Troubleshooting Guide: Troubles Guide NO Power Check battery installation and/or replace batteries. Voltage Capacity Quickly Go Out. The battery life is over, replace new one Couldnt communicate with other group members First, please verify that the channel frequency and the CTCSS you are using the same as those of your group members. If the channel frequency and the CTCSS are the same, please verify that your group members are within the radio coverage. Hear the voice from other groups  Please change your CTCSS for the channel. At the same time, you also need the CTCSS for all the radios in your group. If you dont like it, you may apply another channel frequency. Why can I hear the voices clearly from other group, sometimes, my voice is intermittent Please check whether the MIC is blocked by something. If so, please return the radio to your authorized dealer for maintenance. Sometimes, your frequency is same as the frequency of other groups. Cant turn on the radio and even it is turned on, it often shuts off automatically Please check the battery contacts on the radio. If it is broken or twisted, please return the radio to your authorized dealer for maintenance. 1,Scrambler 2,Noise reduction circuit 3,Long standby time 4,High capability li-ion battery 5,Battery save .CTCSS.DCS 6,Reporting number command of English and Chinese function humanism design.