i7s tws Wireless Headphones Bluetooth 5.0 Earphones sport Earbuds Headset With Mic Charging box Headphones For all smartphones

Details: Features: 1. listening to the song correct; support songs and call; 2. remind call number; the last call back; all intelligent Chinese and English voice prompts; boot; pair; shut down the phone power will be low voice prompts; 3. Power capacity will show on your Iphone; you can see the power situation anytime; do not worry about the electricity ; make your life without worry; 4. One to two connections; can be connected to two mobile phones at the same time 5. Bluetooth headset connected to the phone after the shutdown  ; and then open the Bluetooth headset will connect back to the phone  automatically  ; more convenient; 6. Intelligent compatibility: support all Bluetooth mobile phone; tablet; notebook; singing it; QQ music; movies; etc.; universal all mobile phone Specification: 1. Driver: 15mm 2. Impedance: 32 OHM 3. Bluetooth version: Bluetooth v5.0 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) 14. Talk time is about 2-3 hours 15. music time about 1.5-2 hours 16. Standby time is about 100 hours Package Includes: 2 x i7s tws bluetooth earphones (left and right earphones) 1 x Charging box 1 x USB Charging Cable 1 x User Manual