1. Bluetooth version: V5.0 + EDR
2. Bluetooth protocol: A2DP / AVRCP
3. Bluetooth distance: 15 meters
4. Interface: RCA / AUX / USB
5. Frequency range: 10Hz-20kHz
6. Signal to noise ratio: 110dB
7. Impedance: 75 ohms
8. Support multiple audio output ports: can connect 3.5mm headphones, stereo system, speakers
9. Support USB 5V DC output
10. System Support: All Bluetooth Audio Devices; NFC Available Devices
11. Support NFC mobile phone device touch connection, no need to manually connect
12. Barrier-free 15 meters stable transmission, built-in signal antenna
13. Dimensions: 109x73x29mm

Packing list:
NFC Bluetooth Audio Receiver x 1
Micro USB charging cable x 1
3.5mm to RCA cable x 1
Audio cable x 1