H58 Bluetooth 4.1 Single In-ear Invisible Wireless Bluetooth Earphone 1. Bluetooth version: 4.1 2. Support mode: HSPA2DPhfpAVRCP 3. Talk time for listening to songs: 8-10 hours, standby time: about 240 hours 4. Li-ion battery: 80mAh, working time: 10 days 5. With noise reduction and echo suppression technology, the sound quality is still excellent in any noisy environment 6. Strong compatibility, basically all digital products with Bluetooth function on the market can be used 7. The weight of the product is relatively light at 3.5g, it feels comfortable to wear on the ear, and it is invisible 8. Transmission distance 10 meters DSP intelligent noise reduction 9. Language prompts in Chinese and English 10. Able to connect two Bluetooth devices at the same time 11. Ergonomic design, comfortable to wear 12. Waterproof design, effectively prevent various water splashes and sweat erosion, and effectively extend the life of the earphones