AMAKE 35dBi 3G/4G LTE SMA Antenna Signal Booster High Gain Long Range Network Antenna Omni with SMA Male Cable Connector 2M for Huawei Wifi Hotspot MiFi Mobile Wide Broadband(SMA-J) The newest 35dbi high gain 4G LTE SMA antenna ,which can enhance the range and width of your 3G/4G LTE signal extremely This SMA Male Antenna with dual SMA connectors and 4G LTE Working frequency: 791-2690MHz ,it must to connected with your 4g LTE Modem/Router with SMA connectors to get it works This antenna with 2 meters long cable and vacuum suction cup,to gain high quality 3G/4G LTE signal,you can place it near your windows or some other well-wentilated place and towards it to cell signal tower If this antenna didn't get much improvement,then please try to exchange the 2 connectors,check and set your router's antenna setting into 'External Antenna' Any of our customer with any technical inquiries,feel free to contact our tech support:amazon@szamake.com .We provide a 7/24 friendly tech support.Thanks.