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.