Boost the cellphone signals and data speeds in your office with the SmoothTaler Stealh X2 High Power Building Booster Kit, with a LED signal display. With a system gain of 60db, this kit features automatic network overload protection, ensuring that it can handle maximum gain at all times. The 3G,4G signal booster covers the following cellular frequency bands: Band 5 (850 MHz), Band2/25 (1900 MHz)