Sound register function, humanism design Li-ion and ni-mh battery compatible Strong housing 16 channels available Maximum distance calls: >3km Tone to confirm the end of the call Pc programming Channel preferences, Convenient and copy quickly Low battery alarm. Ultra-small size stylish appearance, solid structure, Output power: 2w/5w Current: _1.6a/1a Frequency range: 136-174mhz, 400-420mhz, 430-450mhz, 450-470mhz Operating voltage: 7.2v dc Number of channel: 16 Channel spacing: 5, 10, 12.5, 25khz Frequency stability: + 5ppm Antenna impedance: 50¼+ Modulation sensitivity: 12 mv (deviation2.2khz-3.6khz) Maximum deviation: _ 5khz Modulation deviation: 5% Ctcss deviation: 0.75khz+ 50hz Spurious emissions: _ 7¼w Modulation mode: fm (16¼f3e ) Residual modulation: _ -35db Rf sensitivity: _ 0.25¼ v Squelch sensitivity threshold: _ 0.25¼ v (turning on) Audio output: 500mw Audio distortion: _ 10% Modulation receiver broadband: 2x5khz Spurious rejection: 55db Selective: 65db Inter-modulation+ 60db Blocking: 85db 113*50*35mm