Compatible with 4G mobile broadband modem routers, simple installation, no software required. Conditions of use: the corresponding interface SMA, the corresponding frequency band of the device Compatibility list: 3G 4G router modem (gain: 10-12dBi) Can be used indoors or outdoors to enhance and maintain good signal quality. Installation tips: The antenna should be installed vertically to maximize performance, and the antenna should not be installed on metal size:23 x 6.5 x 6.5CM Material:Metal and plastic colour:White Package Contents: 1 x 4G Antenna 2 x cable Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.