RDU4160d Standard Features: Range up to 350,000 sq. ft. or 30 floors indoors 4 Watts of power 16 pre-programmed channels to communicate with separate work groups 89 UHF business-exclusive frequencies and 121 interference eliminator codes Custom programmable to match other business band radios Repeater capability, compatible with radios using repeaters to extend range Exceptional Audio Quality – 2000 mW of audio output, speaker magnetic field reduction, wind-noise reduction and improved RF specifications Backlit LCD display featuring channel, frequency, code, signal strength, battery status and other programming features Front panel programming buttons with Manager lock 3 Voice Scramble settings to reduce eavesdropping Cloning compatible – Setting of one radio can be copied to another (requires optional multi-unit charger or cloning cable) VOX – Hands-Free use with audio accessory 3 different Call Tones – grab the attention of the people you need to reach 2-pin accessory plug (compatible with CLS, XTN & AX series) AA Battery Compatible (requires 5 AA cells & alkaline battery frame accessory) Size: 4.5 in. H x 2.2 in. W x 1.6 in. D Weight: 10.3 ounces (with standard battery) Talk Time Features: Li-ion Rechargeable Battery Life – Up to 18.5 hours per charge with standard battery and up to 26 hours with higher capacity batteries AA Battery Life – Up to 26 hours