Wireless Bone Conduction Headset IPX8 Waterproof MP3 Headphones Bluetooth 16G MP3 Swimming Sports Earphones Music Player

Specifications:
1.Waterproof design: IPX8\IP55, can work underwater 3 meters
2. Bluetooth version:5.0, working distance<=10 meter, listen to music, answer/reject calling
3. Bone Conduction headset
4. Memory: built-in 16GB
5. Support system: Windows / OS MAC system (genuine) WIN7, WIN10
6 .Frequency response: HZ 20HZ-20KHZ
7 .Operating temperature: 0 ~ + 50 degree centigrade
8 .Power supply: built in rechargeable lithium battery 350mAh
9 .Play time: listening to music for about 6-8 hours
10 .Supported formats: MP3/WMA/WAV/FLAC APE music format
11. Charging time: about 2 hours
12 .Charging voltage: 5V
13. Size: 16.9*13.1*5.4cm
14. Full weight: 150 g