Digital Antenna 824-894/1850-1990 MHZ (cellular/PCS) dual band wireless 70dB home, office, marine and RV wireless cell booster is designed to offer high gain with less antenna separation. Works with all 850/1900 MHz cell phones or air cards operating on any modulation including CDMA, GSM, TDMA, PCS and EV-DO. It boosts the signal strength of your cell phone or air card to 3 watts and improves transmit and receive signals. Amplifies cellular signal up to 30+ miles. Not for use in open console boats. Wireless operation. No physical connection to cellphone required and All needed accessories are included.