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Smoothtalker Stealth Z672 home/building booster covers all cellular devices and all cellular network providers. It will boost data, voice and provide signal where you need it. Features automatic oscillation control, and network overload protection to maintain optimum performance at all times. Versatile, reliable and long lasting cellular signal boosting solution. This booster can be used with optional splitters and antennas to expand the coverage footprint. This 3G,4G,LTE Signal Booster Kit covers the following Cellular Frequency Bands: Band 12/17 (Lower 700MHz), Band 13 (Upper 700 MHz), Band 5 (850 MHz), Band 2/25 (1900 MHz) Band 4 (AWS 1700/2100 MHz).