TECHTOO Hi-Gain 3G 4G LTE Indoor 6dBi Omnidirectional Wide Band Antenna 800-2690MHz Ceiling Antenna Mounting kit for Cellphone Signal Amplifier/MiFi Jetpack/Mobile HotSpot Device Increases Your Wireless Coverage by up to 300% Indoor Omnidirectional Coverage the Whole Floor Support Frequency Range of GSM/CDMA/PCS/3G/WLAN/4GLTE System Device Easy Installation with Ceiling Mounting, 1 X N Female Connector to Signal Booster NOTE: This is a passive antenna, I can not work alone. It must work together with other active network device like signal booster/repeater/router/access point