Stay connected - wirelessly! Dual band wireless cellular mobile amplifier/repeater is ideal for RVs, boats, cars, homes, and offices. Boosts cell phone signal strength up to 3 watts, increases cell range up to 50 miles and provides greater reliability. Complete system for easy installation includes an external antenna and bracket, internal antenna, 12 VDC & 110 VAC power supplies, and 30ft low loss coaxial cable. Note: Some wireless carriers have not approved B-Directional Amplifiers, Cell Boosters, Repeaters or their equivalent for use on their networks. Users should consult their wireless service agreement regarding use of this product.