S530 Mini Wireless Bluetooth Headset Sports Stealth Stereo H

Stereo chip (mono bluetooth), the main song, call-based, 1. driver: 40 mm 2. impedance: 32 ohm 3. bluetooth version: bluetooth v4.0 + edr 4. power level: class ii 5. output power: 30mw 6. bluetooth distance: 10 meters barrier 7. frequency response: 20-20000hz 8. working voltage range: 3.0v-4.2v 9. mitou sensitivity: -42db 10.high-quality stereo audio transmission and remote control protocol with a2dp / avrcp 11. powerful noise reduction circuit (active noise reduction) 12. chinese and english switch (bluetooth is not connected, press the switch twice, you can hear the tone switch successfully) 13. charging time is about 1 hour (power indicator charge: red light is on, fully charged: red light is off (blue light).) 14. product size: 20mm long. 15mm width. 18mm in height 15. product net weight is about 4g 16.talk time is about 4-5 hours 17. music time is about 3-4 hours 18. standby time is about 2-3 days