<b>7*24Hr customer service: service@ucloudlink.com</b><br><br> <b>Wi-Fi Protocol: IEEE802.11b/g/n</b><br> <b>Certification: 3C/FCC/CE/RCM/MIC</b><br> <b>LTE-FDD Band 1/2/3/4/5/7/8/9/17/19/20</b><br> <b> LTE-TDD Band 38/39/40/41</b><br> <b> WCDMA Band 1/2/4/5/6/8/9/19</b><br> <b> GSM 850/900/1800/1900MHz </b><br> <b>Data Encryption: WPA-PSK/WPA2-PSK</b><br> <b> Screen Size: 4.0 inch </b><br> <b> Battery Capacity: 5350mAh（3.8V 20.33Wh）</b><br> <b> Size: 126.5*65*19mm </b><br> <b> Weight: 240g (net) </b><br> <b> Screen Size: 4.0 inch </b><br>