i28HD Handsfree tws pro earbuds 2 Headphones Earphone

Bluetooths 5.0, POP-Up window connection, Optical Ear sensor, Real Battery Display1. Short play (pause) of music / answer to a call;
2. Dual (right) earphone to next music, left earphone to back music
3. Siri wakes up easily
4. cancel the open situation and close it to the closed situation;Products include 1 * one pair of bluetooth headset 1 * charging cable 1 * charging cable 1 * User ManualSpecification:
* 1. Driver: 15mm
* 2. Impedance: 16 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: 10-15 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. Talk time is about 3-4 hours
* 14. music time about 3-4 hours
* 15. Standby time is about 300 hoursPackage Includes:
* 2 x mini Bluetooth Headphones(left and right earphones)
* 1 x Charging box
* 1 x USB Charging Cable
* 1 x User ManualNotes:
this is the A+++ high quality i23 TWS, and stereo wireless bluetooth earphone, with good sound.
now all the product is bluetooth 5.0, double ear have voice when calling.