Home Use Mini Signal Booster CDMA850 Single band Signal Booster Signal Repeater ST850A What is the cell phone signal booster? Cell phone signal booster (also named repeater,Website: , amplifier) is a product designed to solve the mobile phone blind signal. As the mobile phone signal is transmitted by electromagnetic waves to establish a communications link, however there are a lot barriers make it is unavailable to get sound signal. When people enter some tall buildings, some places basement malls, restaurants and parking lot, some places of entertainment such as karaoke sauna and massage, some public place such as subway, tunnel and etc. where cell phone signals can not reach, now the cell phone signal booster can solve these problems! The entire range of mobile phone signals can be well used; we all will get great convenience and benefit from sound signal. Our boosters are the perfect solutions for a wireless improvement in the mobile reception! ST850A mobile phone signal booster specification Frequency range GSM 824-849 869~894MHz output Up link :15dBm Downlink: 17dBm Gain Up link: Gp≥65dB Downlink: Gp≥68dB Noise figure ≤6dB Ambient temperature -15°C~55°C Size/weight 130*95*28MM/600g Function AGC/ALC I/O impedence 50Ω/N connector Transmission delay ≤0.5μs Power supply AC/220V±10%   45~55Hz Coverage area 300sqm Terms and Conditions Certificate CE/RoHs Country of Origin China Port of Dispatch Shenzhen Production Capacity 1000pcs/month Date of Delivery Within 3 days after received payment inform MOQ 10pcs Warranty 2years Pacakge 1pcs/box; 20pcs/carton Country of Origin China Mobile Phone signal Booster Installation complete kit items Signal booster Outdoor antenna Indoor antenna Cable Splitter (When there are more than 2 indoor antennas) Connector(N connector, F connector, N to F connector, SMA connector etc) Mobile Phone Signal Repeater Installation Steps Step 1: Install the outdoor antenna in a suitable place Step 2: Connect the outdoor antenna to the booster “outdoor” side by cable and connector Step 3: Connect the indoor antenna to the booster “indoor” side by cable and connector Step 4: Connect to the power Features Elegant appearance, mini size, light weight Easy installation. No interference to the base station, no harm to people health. CE & RoHS proved. Low consumption. ALC technology. Stable performance. Environment Friendly, Energy-Efficient. Comply to the ETS300 694-4 standard  Comply to the GB6993-86 standard Wide band repeater to support signals of all operators. High-integration (One board to contain low-noise amplifier, frequency selection module, power amplifier module, both uplink and downlink one for all). Manual gain control, Automatic gain control, Artificial Intelligence function can protect the repeater together the BTS perfectly. Auto shut off function as final step to avoid severe interference with mobile net network and energy saving. LED Indicates LED Status Definition Power Red Normal Off DC power problem DL(Downlink) White No signal received Solution: Adjust the outdoor installation to get sound signal(see page 14) Green Signal received ok but not perfect Solution: Adjust the outdoor installation to get sound signal(see page 14) Red Full signal received UP(Uplink)) Flicker When there is a call, it is normal Green Always green means self-excited Solution: Turn off the booster, adjust the indoor and outdoor antenna again, and try to expand the distance or create some barriers between them.