1. Bluetooth version: 5.0
2. Transmission distance: barrier-free distance 10-15 meters
3. Product speakers: high quality true copper ring speakers
4. Product chip: true stereo chip
5. Working time: about 3-4 hours
6. Standby time of charging compartment: about 30 days
7. Headphone battery capacity: 50 mA
8. Battery capacity of charging compartment: 400 mA (with IC protection board)
9. Automatically power on, pick up and use
10. Put the earphone in the warehouse to charge automatically
11. Ergonomic design, comfortable to wear
12. The package includes: earphone * 2 + charging compartment + USB charging cable + manual + packing box