HR800-N Repeater System for NEXTEL Cover's up to 2,500 sq. ft and operates up to 5 simultaneous callers. Supports iDEN technology /SMR (Nextel, Southern LINC, Mike) cellular phones operating in the 800MHz frequency band. Not compatible with Cellular/PCS Carriers. Plug and play operation, Easy D.I.Y. installation, and Maintenance free. Auto Level Control (ALC) and Auto Gain Control (AGC) Comply with FCC, CE, RoHS rules and regulations.