BT-21 Bluetooth 5.0 Adapter Bluetooth Audio Transmitter Receiver

1. Bluetooth version: V5.0

2. Support protocol: RX supports A2DP, AVRCP, TX supports A2DP

3. Working frequency band: 2.402GHz-2.480GHz

4. Power level: Level 1

5. Sensitivity: -80dBm is less than 0.1% BER

6. Signal to noise ratio: greater than or equal to 75dB

7. Distortion: less than or equal to 0.1%

8. Support dual stream (TX mode supports one transmitter to connect two Bluetooth speakers or headphones at the same time to use one CODEC)

9. Support multi-point connection (RX mode supports connection of two mobile phones)

10. Codec mode: TX is apt-X HD, apt-X LL, apt-X, SBC, RX is apt-X HD, apt-X LL, apt-X, SBC

11. Note on using APTX: apt-X HD CODEC is preferentially supported in single connection (the connected device must also support apt-X HD)

12. Built-in battery: 1000mAh

13. Charging current: about 200mA

14. Charging time: about 4.5 hours

15. Life time: RX is greater than 20 hours, TX averages about 15 hours

16. Bluetooth distance: greater than 80m (straight line without obstruction)

17. Charging method: Micro USB 5V/0.5A

18. Input/output connection: SPDIF interface, AUX interface

19. Compatible: Android, IOS system phones, tablets and Bluetooth speakers or headphones that support A2DP protocol

20. Dimensions: 114 x 100 x 20mm

21. Weight: 270g

a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a