Features:The Function of the Signal Repeater: it firstly pickup the outdoorcellphone signal by the outdoor antenna, and then transit the signal to the signal repeater through coax cable, which is used to boost the signal, and finally transit the signal out to the indoor antenna for cellphone signal coverage enhancement. Significantly Improve Signal: the users in the covering area will have a stable and reliable communication experience.LCD Display: clear LCD screen to display signal strength, output power, and gain, it is nice for you to monitor the real-time signal status.Wide Frequency: work for 900MHz+1800MHz+2100Mhz signal frequency.Straightforward Installation: the signal booster kit including signal repeater, indoor antenna, outdoor antenna, coax cable, accessories, power adapter, and a users manual for reference, it is very easy to for you to install by yourself.