Retevis RT1 Two Way Radio 10W UHF 400-520 MHz 16CH VOX Scrambler Handheld Transceiver Ham Radio (2 Pack) and Programming Cable Output power: High:10W/Low:5W: Range up to 4 miles depending on environment and terrain 3600mAh Lightweight battery,260 hours long standby time: Enhanced battery performance,Low-battery alert,battery lasts longer,with no memory over-charge side effects 1750HZ tone: convenient to connect the repeater, launching further distance Side-key assignment: With the program software,you can set up the function you like;It is convenient to operate Including programming cable,We provide free programming software;There is a password request while reprogramming this radio;Please note that you needn't to enter any password but just click OK will be able to reprogram it