Features : Works with AT&T Wireless, Verizon Wireless, Sprint and Alltel, but not with T-mobile. Improves 850 MHZ signal reception and call quality of your cell phone especially in poor reception areas. Reduces dropped calls, extends signal range and increases data rates. Built-in amplifier boosts signals to and from the cell site. Easy to install. Suitable for your vehicle, RV, boat, home and office. Specifications : Frequency : LB-001 – 900 MHz, 890-915 MHz (up), 935-960 MHz (down); LB-001A – 850 MHz, 824-894 MHz (up); 869-894 MHz (down) Gain : 30dB (up), 25dB (down) Output power : 8dBM Noise : <=6dB Impedance : 50 omega Power : AC 220V/100V, 50Hz/60Hz, DC12V or Car 12V DC 200MA Connector : SMA female Dimensions (H x W x D) : 150mm x 91mm x 21.5mm Weight : 0.2kg Coverage area : 20-30 square meters Package Includes : Signal Booster Antenna x 2 12V DC Fused Cigarette Lighter Adapter AC Adapter