-Callboost 37dBm 90dB high power signal booster easy to cover indoor coverage area upto 5000-8000㎡,outdoor upto 1-2km big coverage range. -Callboost Digital ALC technology,auto limit the output power to ensure stable signal coverage. -LCD display of system operating status such as frequency,gain,output power and isolation. -ISO display and alarm function make installation and debugging easy. -Able to increase signal coverage,decrease mobile phone radiation, and increase mobile phone battery lifespan. Send us inquiry to get code for checking the specifications.