1Support for WCDMA: B1,B3, B5, B7,B8, B20 , B38,39,B40. Support region: Asia, Africa, Europe (Japan and America are not supported) 2Carefully designed the bottom, the heat dissipation effect is good, support multiple devices simultaneously connected, easy to achieve 4G Internet 3150 Mbps download speed, up to 10 WiFi devices share your network and enjoy download speeds of up to 150 Mbps 4Lasting power supply, built in 2100mAh lithium battery lasting power supply 5Intelligent security, intelligent security for security . Portable 4G router, full high speed, portable smart Item Type: Wireless Router Material: ABS Product Model: For D921 Speed: 150 Mbps Memory Card: Upward Compatible with 32GB Supported SIM Card Type: Micro SIM (Excluding SIM Card) Built in Lithium Battery: 2100mAh Sharing: Up to 10 Users For WCDMA Support: B1 , B3 ,B5 , B7, B8, B20 ,B38,39,B40 Regions Supported: Asia, Africa, Europe (Japan and America Are Not Supported) 1 x User Manual 1 x Chargeline 1 x 4G WiFi Router 1. This product cannot be used in Japan and the Americas. The customer's mobile phone card supported frequency band and the frequency band supported by the product can be used.2. This product only supports Micro SIM card (excluding card)3. Aiming at WiFi, summarizes: 1, the customer's card is not open or not activated, there is no traffic, the card is not emitted. 2, the customer put the card insertion, plugged into the memory card where the memory card (should insert the SIM card). 3, the frequency band of the SIM card does not match the frequency band of the machine, it is necessary to use the SIM card to change the SIM card to the frequency band that matches the machine (such as the customer's SIM card is B2, B4, B7, B20) but the machine is (B1,B3) At this time, there is no matching frequency band, and you will not connect to WiFi. 4, the machine frequency band is compliant with the SIM card frequency section, but it is still not connected to WiFi. At this time, the client will automatically install the software, (or connect to WiFi with a computer, open the software in the browser input, account password) Check the machine's APN and call the operator asking the APN detailed data. If not, change it on the software, basically can be connected.4.With built in battery