Operating system : Android 9.0/11.0 POS CPU : Quad-Core Processor Memory : 2GB RAM+16GB ROM Certificate : FCC,CE,CCC,GMS,TMS,FBI & STQC 5.5 inch screen touch long standby battery capacity of 5600 mAh fast thermal printer,fingerprint collection module(optional) 5 MP camera, 2G/3G/4G/wifi/GPS/bluetooth communication. This fine workmanship and top quality machine is the best choice in the market. Android 11.0 operating system