USB Bluetooth 5.4 Adapter Transmitter Receiver Bluetooth Audio PC Adapter

1. Bluetooth version: V5.42. Frequency range: 2.4GHz (2402-2480MHz)3. Support protocol: A2DP, HSP, AVRCP, HID, etc.4. Transmission distance: 20M (open and unobstructed distance)5. Rated voltage: DC 5V6. Interface type: USB7. Operating system: Windows 8.1/10/11 system8. Dimensions: about 23.8 x 15 x 7.2mm9. Note: only the adapter, does not include other items in the pictureFeatures:1. Bluetooth 5.4 chipset, faster transmission speed, more device connections, more stable transmission conditions2. Compatible with multiple Bluetooth versions, automatically backward compatible with Bluetooth devices 5.3/5.2/5.1/5.0 and below3. Wide range of compatibility, support multiple devices connected to Bluetooth at the same time4. PC connected keyboard/mouse, wireless operation5. PC connect audio, wireless listening, support multi-device connection, no delay, mobile bluetooth, stereo HD sound6. PC connected Bluetooth headset, enjoy the freedom of wireless music7. Built-in wireless signal enhancement, to achieve 20 meters barrier-free long-distance transmission, stable and smooth connection, refused to intermittent/disconnected connection