Notice: The antenna works for Huawei Router, can improve phone/computer wifi signal, can not improve 4G/3H/2G signal. Thanks! This Antenna will work with Mobile Broadband devices that have SMA External Antenna Port. - Greatly enhance the mobile broadband Network coverage and Wifi receiving capabilities of your 4G/3G Mobile Router. if you are in a low signal area. and it is the Highest Gain 30dbi 3G/4G LTE Antenna. This item have two SMA Connectors, The cable length is 2.9 Metres. Frequency Range: 690~2700 MHZ. Connector Type: SMA male. Specification: VSWR: 1.5 Polarization Type: Vertical Maximum Input Power: 50W Input Impedance: 50 Ohms Size:22 x 2.5cm (H*W) Weight: 124g Feature: --- Fit for Mobile Signal Routers: 1): Huawei E5186, Huawei B890, Huawei B593U-12, Huawei B593S-22, Huawei B593U-91, Huawei B593U-12, Huawei B593U, Huawei E5172AS-22, Huawei E5172S-22, Huawei E5172, Huawei E5175, Huawei B880. 2): ZTE MF28G, ZTE MF29T, ZTE MF29S2, ZTE MF28D, ZTE MF253, ZTE MF283, ZTE MF25D. 2): Vodafone B4000, Vodafone B3000, Vodafone B2000, Vodafone B1000. Package Content: 1 x 4G/3G LTE SMA Antenna