It uses the external USB power supply. It is a power 4G wireless router with 4G slotIt is a solution for enterprise, home, company, office's Wi-Fi networking.It's compatible with IEEE 802.11b/g standard, the data rate reaches to 100Mbps.It can support 5-8 Wi-Fi Users simultaneously.The frequency band is: FDD: B1 B3 B7 B8 B20, 3G: B1, Support Europe, Africa, part of Southeast //South America.Type:USB DongleType:WiFi RouterType:WirelessInterface Type: USBApplication: LaptopApplication: DesktopFor: desktop/laptop/cpmputer/any devices has wifiPlug and play: power bank/car charger/usb adaptecolour:WhiteMaterial:plasticPackage Contents:1 x usb dongleOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.