Increase cell phone range up to 50+ miles! Reduce dropped calls. Greatly enhance data and Internet connections. No physical connection to cell phones. Works with all USA and Canada cell carriers except iDEN. Complete systems include 3 watt amplifier/repeater, outside and inside antennas, antenna mounting bracket, cable, and 12VDC and 110VAC power supplies. 60dB Repeater 4KMR-30U €“ 40dB gain system recommended for mid-size RVs. Inside and outside antennas require a minimum separation distance of 15'. Inside coverage area €“ 1 room up to 1,000 SF.