Bluetooth version: 5.3
1. New bone conduction technology, 16mm large moving coil unit
2. Effectively reduce sound leakage, sound insulation and vibration prevention
3. Stronger anti-interference ability, low latency, and smoother games
4. IPX5 sports waterproof, light to wear without burden
5. The directional vibrator is more comfortable to wear without in-ear
6. Vibration speaker size: 16mm
7. Bluetooth transmission distance: ≥10M
8. Playing time: about 7 hours
9. Charging time: about 2 hours
10. Speaker specifications: 0.5W, 8Ω, 86±3dB
11. Rated input: 5V=100mA
12. Headphone battery capacity: 135mAh
No products in the cart. 
1. It is not very true that it is technology by bone conduction, since it sounds like you have a speaker without having them on, simply having them on the table and without touching them.
2. I have gone to run with them and having no option of graduating the restraint or in the rear (never) and/or in the ear, they constantly dance and it is uncomfortable.
3. The sound or rather the graduation of the same is negligible, putting it to the maximum both in the player (laptop, desktop, mobile...) is very low...
You have to put it correctly because it may happen that you hear one earpiece stronger than the other.
Instructions come in Chinese and English.
No sound, which is expected. But it could have been better for such shit. Tickling low, which is also expected. Headphones do not sit very well. Crush, you can't lie down, you can't put on a hat...
In short, Bon conduction tried. They don't pull on "pro" ush-shki...
I hope the battery capacity is bigger.
I only used it the first day (they arrived yesterday) so the battery was also very good.
It's the first time I 've had a bone, so it's in my ear.