Model Number: A-628 Key Specifications/Special Features: Wireless interphone a-628 with alarm function 1. High comparability. 2.voice prompts(chinese/english). 3.ctcss/cdcss. Wireless interphone. Model no.:a-628. Features. Reporting number command of english and chinese. Ctcss/cdcss. Tot(time-out-timer). Moni(monitor). Priority channel scan. Restore to scan channel. Busy channel lockout function. High/low power switching with side key. Alarm function with side key. High capacity battery. Gener. A. L. Frequency band vhf uhf. Frequency range 136mhz-174mhz 400mhz-480mhz. Channel capacity 16. Channel spacing 25khz. Antenna impedance 50o. Microphone impedance 600o. Operating voltage 7.4v dc卤15%. Frequency stability 卤2.5.0脳10-6. Size(without antenna) 58(w)mm脳125mm(l)脳41mm(d). Weight(with battery) 227g. Battery 1300mah(li-ion). Compatible with american military standard(mil-std-810c/d/e). Transmitter(eia-rs 316b standard). Rf power output <5w. Modulation type fm. Modulation sensitivity <15mv. Modulation distortion =5%. Max freq deviation =5khz. Occupied bandwidth =16khz. Modulation feature 卤3db. Spurious radiation =7.5碌w. Adjacnet channel power =-65db. Receiver. Sensitivity(12db sinad) =0.15碌w 12db s/n. Silent sensitivity =0.10碌w. Audio power output 500mw(12o). Audio respond +2 -8. Operrating bandwith >5khz. Co-channel rejection =-8db. Blocking =85db. Adjacent channel selectivity =65db. Standby current 50ma or 15ma. Spurious response =60db. Intermodulation rejection =60db. Main Export Markets: North America