General SpecificationsFrequency Range??vhf136-174/UHF 400-470MHzChannel Capacity??16Channel Spacing??25KHzOperated Voltage??3.7 VBattery??H-1500MAh Li-ionBattery Life(5-5-90 duty cycle) About 8 hoursFrequency Stability????2.5ppmOperated Temperature??-30??c-+60??cAntenna Impedance??50??Communication Range??about 6km TransmitterRF Power Output??3WModulation??F3ESpurious Emission????65dBFM Noise????-45dB(W) ??-40dB (N)Audio Distortion????5%Transmitting Current????1.3A Receiver Sensitivity (12dB SINAD)????0.20 uVSelectivity??55dB/50dBInter-modulation????65dBSpurious Response????60dBFM Noise??45dB/40dBAudio Power Output??1000mWAudio Distortion????5%Standby Current ??15mA (with battery save on)