VIKEFON BT-21 Bluetooth 5.0 Adapter Bluetooth Audio Transmitter Receiver

1. Bluetooth version: V5.02. Support protocol: RX supports A2DP, AVRCP, TX supports A2DP3. Working frequency band: 2.402GHz-2.480GHz4. Power level: Level 15. Sensitivity: -80dBm is less than 0.1% BER6. Signal to noise ratio: greater than or equal to 75dB7. 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, SBC11. 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: 1000mAh13. Charging current: about 200mA14. Charging time: about 4.5 hours15. Life time: RX is greater than 20 hours, TX averages