Celestech I7TWS Twin Bluetooth Wireless Stereo Earphones With Built-in Mic for all smartphones Bluetooth  (White, True Wireless)

I7TWS is a smart stylish pair of earphones. They are wireless and designed to provide a comfortable hearing. There is no hassle of wire entangling . These earphones have a broad compatibility and come with noise cancellation. The product specifications have been listed below Specification: 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 4-5 hours 14. music time about 4-5 hours 15. Standby time is about 100 hours Package Includes: 2xmini Bluetooth Headphones(left and right earphones) 1x Charging box 1xUSB Charging Cable 1xUser Manual