Rocketek RT-BT4B USB External Bluetooth 4.0 Adapter

1. Product material: ABS 3. Product interface: USB2.0 4. Operating frequency: 2.4MHz 5. Transmission rate: 3Mbps 6. Transmission distance: <=20m (the barrier-free transmission effect is better within 10m) 7. System compatibility: Windows 10/8.1/8.7/XP/Vista