I'm a i7s-TWS Ear phonebuds

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 v4.1 + 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. Mitou 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. Charging time about 1 hour (power indicator charging: red light, full power: red light off (blue light).)
15. Product Size: Length 25MM. Width 15MM. High 35mm
16. Battery capacity 60mAh