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.4KSBR-50U €“ 60 dB gain system recommended for RVs 40' in length or greater. Inside and outside antennas require a minimum separation distance of 40'. Inside coverage area €“ up to 5,000 SF.