1. Interface type: USB
2. Material: Aluminium alloy/ABS
3. Wireless version: 5.0
4. Chip: BR8651
5. Connect distance: 20m
6. Compatible protocols: A2DP, H2DP, HSP, AVRCP, HID, ect
7. Features: Upgrade 5.0, wireless connection, 20 meters stable transmission, CD-level sound quality, strong compatibility
8. Size: 2.5*1.5*1.2cm