OneDer S2 Head-mounted Wireless Bluetooth Version 5.0 Headset Headphones, with Mic, Handsfree, TF Card, USB Drive, AUX, FM Function (Black) Tag-Backlight Plate & OCA and download and open them

and download and open them on a computer through a USB flash drive

Help to keep yourself and your property safe and secure

Flip cover design makes it easier to work

Rubber scale roller

OneDer S2 Head-mounted Wireless Bluetooth Version 5.0 Headset Headphones, with Mic, Handsfree, TF Card, USB Drive, AUX, FM Function (Black) Tag-Backlight Plate & OCA and download and open them1. Bluetooth headset, mic inside, hands free function 2. Support TF card, USB drive, AUX, FM 3. Rechargeable li ion battery; charging port: Micro USB 4. Play time: 3 5H 5. Bluetooth distance: 10m 6. Bluetooth version: 5. 0+EDR 7. Speaker: 3W, resistance: 8 ohms 8. F. R.: 20Hz 20KHz 9. Distortion: 90DB 10. Battery: 900mAh 11. Product size; 18*16. 8*8. 6cm(fold), 21*19. 7*8. 6cm(unfold) Specification: Package Weight One Package Weight 0. 64kgs 1. 41lb