Retevis RT1 2 Way Radio 10W UHF 16 Channel 1750Hz Tone VOX Handheld Mobile Transceiver (5 Pack) 16 memory channel and easy to use; each work group can have their own channel to minimize disruptions in other departments Output power true 10W; range up to 6.4 km depending on environment and terrain;3000mAh High-capacity battery; 260 hours long standby time Side-key assignment with the program software you can set up the function you like; It is convenient to operate COMP scramber function to make your communication be more confidential; high gain antenna and common antenna increase your distance 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