Description:  CDMA\/PCS 850\/1900MHz Mobile Phone Signal Repeater Booster Amplifier US Plug   1. A mobile phone signal repeater provides the ultimate solution in any area where cellular communications can not work well due to leak of signals. 2. The repeater device features easy installation & operation、 build-in indoor antenna and no interference. It could also improve indoor electromagnetism environments、 protract cellular battery life and reduce radiation of cellphones. 3. A mobile phone repeater is ideal for house、 home、 office use.   Functions:   1.High Gain、 Easy Installation And Operation; 2.Full-duplex、 Single-port Design、 Build-in Power Supply; 3.Use ALC Technology、 Adjust Extent Automatically; 4.LED Light Working & Signal Condition Indicators; 5.Big Linear Power、 Control Inter-modulation & Scatteration Stably; 6.Dependability Stand By GB6993-86 Standard; 7.Compatibility Of Electromagnetism According With ETS300 609-4; 8.CE And RoHs Approved.   Specification:                Item         Specification               Up Link         Down Link               Frequency         814~849MHz; 1850-1910MHz         869~894MHz; 1930-1990MHz               Power         -70 ~ -40 dbm \/ FA(1.23MHz)               Gain         55dB         60dB               Max Output Power         +17dBm \/ Total Power         +17dBm \/ Total Power               Impedance         50Ω               Seclusion         > 70dB               Power Supply         AC 110\/220V (Used AC\/DC Adapter 5V DC)               Compact Design         Indoor Use               Item Diemension         190 x 150 x 21mm          Technique Supporting:   If still no signal recript after after activated repeater、 please check if door antenna point to signal tower or elsewhere have strong signal and check if strength achive -70dBm;   If can not call out、 please adjust the direction of outdoor antenna;   If stength is not steady、 please check if outdoor & indoor antennas are too close. Please ensure the outdoor and indoor antenna have distance of 20m at least、 with a wall between and not in a horizontal line.       Installation Approachees:   Fix up outdoor antenna reception on housetop and point to signal tower;   Connect outdoor antenna to "Outdoor" port in repeater machine through cable;   Connect outdoor antenna(s) to "Indoor" port in repeater machine through cable also;   Plug power adapter into AC power socket and finish installation.      Package Included:      1 x Amplifier Main Device   1 x Adapter (US Plug)   1 x Outdoor Antenna Set (10m)   1 x Indoor Anternna   1 x English User Manual     Details pictures: