V2 PRO Tech Specs OS:Android OS  SUNMI OS CPU:Corte-A53 quad-core 1.4GHz Memory:1GB RAM+8GB ROM Printer:Built-in 58mm thermal printer Print speed: 70mm/s Paper roll: Φ40mm Card Slot:1* PSAM 1* MINI SIM Network:2G & 3G & 4G Wi-Fi:2.4GHz/5GHz Supports IEEE 802.11 a/b/g/n Bluetooth:Supports Bluetooth 2.1/3.0/4.2 Supports BLE Battery:Non-removable lithium polymer battery 7.6V/2580mAh