Model NO.: Pad Air 2 Battery Capacity: Non-Removable Li-Po 7340 mAh Battery (27.62 Wh) Memory: 16/32/64/128 GB Network Mode: 3G, 4G Operating System: Ios 8.1, Upgradable to Ios 11.4.1 Built-in Bluetooth: 4.0, A2dp, EDR