This is a Kenwood VHF repeater, model number TKR-750-1. This is a 32 ch , 50 watt repeater that operates in the 146-174 Mhz range. Repeater is capable of both narrow band and wide band operation. This unit does not come with a duplexer. I have NEW VHF mobile duplexers available for an additional $175.00 (price includes tuning). These units include an internal AC/DC power supply and a power cable. Free programming is available (1-16).NOTE: If your order includes programming, please email us a request for our Programming Form after checkout. We will only program up to 16 channels and do not program for trunking systems.