1. Operating system (OS) environment: Android OS V6.0 or higher 2. Interface: Bluetooth, Wi-Fi, Ethernet, USB 3. Supported printers: some models of Bixolon POS / Mobile, Label Printer 4. Detailed function 1) browser settings Manage your browser's home, history, cookies, cache, and more 2) Printer Settings : Managing Printer Connections 3) Web Server Settings : Manage settings such as server port and background service