DESC: Wireless in-home/building solutions that covers up to a 2500 sq. ft. room It will work with any handheld cell phone that uses 800 MHz or 1900 MHz cellular bands and operates in the AMPS, CDMA, TDMA or GSM formats. Ideal for coverage in the home, office, college dorms or apartments. Our unit does not give off any significant radiation inside of the vehicle and in fact helps to reduce the radiation that is given off by your phone. 1 year warranty from Richardson Electronics.