1. Chip: RTL8761B
2. Interface: USB2.0
3. Bluetooth version: 5.0
4. Transmission frequency: 2.403-2.480GHZ
5. Transfer rate: up to 3MBPS
6. Transmission distance: about 10-20M without obstruction
7. Support system: WIN7/8/8/8.1/10
8. Features: wide compatibility, long transmission distance, stable connection, need to install the driver to use
9. Weight: about 18g/piece
10. Size: about 29x15.4x6.2mm
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