1. Material: plastic. 2. Sizes: 22*17*1.2mm. Weight: 2g. 3. BT version: v5.0 dual mode. 4. Solve the problem of missing BT function on PC. Support multi-device connection (speakers, earphones, keyboard and mouse, printers, etc.). 5. System compatibility: for Windows7 / 8 / 10, for Linux and other operating systems
