Features:
1. USB power supply
2. Supports audio output
3. Supports music play from Micro SD Card
4. Supports MP3 music play
5. Supports BT hands-free answer / hang up / reject / redial
6. Supports BT stereo music player (A2DP)
7. Echo cancellation and noise suppression (CVC) function
8. Auto Power-off memory
9. Supports voice / incoming call reporter
10. Supports PC Micro SD Card reader

Specifications:
- Rated working voltage: 5V
- Limit working voltage: 4.7-5.3V
- Micro SD Card: 1-32GB
- Working temperature: -10° - 60°
- Play format: MP3
- USB Socket: Two way plug
- SNR: >85db
- Degree of distortion: <0.1%
- Frequency response: 20Hz-15KHz
- Resolution of right and left channel: >85db
- Bluetooth sound processing: A2DP (Advanced Audio Distribution Profile) function supported
- Effective distance of bluetooth microphone: 0.5-2m