POS terminal is a terminal device that integrates pos system, barcode scanning function, POS printer and other functions. The POS terminal has a small appearance, simple operation, complete functions, and also enhances the docking ability with the enterprise ERP automation system. It adopts wireless communication. Connect to WIFI and 4G networks, and optionally install NFC, MSR and other card swiping functions. The pos terminal is pre-installed with Android 7.1 or Android 11 system, and has corresponding SDK development software, allowing users to develop various application software under the Android system. POS terminals are widely used in cash register, instrument data collection, community charge management, identity verification, mobile meal sales, attendance, access control, patrol/inspection, meter management, membership-based chain consumption, tobacco monopoly, inspection, etc.