New i7S TWS Mini Bluetooth Earphones Headphones Stereo Bass Wireless Headset Earbuds with Mic Charging Box for All Smart Phone

Description

1. Driver: 15mm 2. Impedance: 32 OHM 3. Bluetooth version: Bluetooth v4.2 + EDR 4. Bluetooth use band: 2.4GHz 5. Power level: CLASS II 6. Output power: 30mW 7. Bluetooth distance: 10 meters barrier 8. Frequency response: 20-20000Hz 9. Operating voltage range: 3.0V-4.2V 10. Mic sensitivity: -42dB 11. With A2DP / AVRCP high quality stereo audio transmission and remote control protocol 12. Powerful noise de-noising circuit (active noise reduction) 13. switch between Chinese and English (boot does not connect Bluetooth state, press the switch 2 times, hear the tone switch successfully) 13. Talk time is about 2-3 hours 14. music time about 1.5-2 hours 15. Standby time is about 100 hours