Increase the signal in your office building or home with the smoothtalker stealth z1 booster kit, with an led console to display signal level indicators. With a system gain of 65db, 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 (1900 mhz)