HD-L20

1. Function: Music/Bluetooth/Call/ Last call redial/TF/FM/AUX        2.Frequency：20-20KHZ 

3.Material: ABS 

4. Bluetooth Version:5.0

5. Transmission distance: 10m

6. Sound : both stereo

7. Standby time: 160 hours

8. Battery：400/450Mah

9.Music time：around 8-12 hours

10. Talking time：around 10-12 hours

11.Charging time：around 1-2 hours