The New Best universal Mini True Stereo Wireless Bluetooth headset Twins Earphones In-Ear with Stereo Voice MIC For Running
Mini True Wireless TWS Bluetooth Earbuds Twins Stereo Headset V4.1 EDR In-Ear With Microphone for iPhone 7 IOS & Android
B1 Mini Twins True Wireless Bluetooth Earphone Bluetooth 4.1 TWS bluetooth Handsfree headset with Charging Box Dock Earbuds
True Wireless Bluetooth Earphones Stereo Sound in ear Earbuds Headphones Noise Cancelling with Mic and Charging Case TWS-B1
Original TWS B1 Twins Wireless Bluetooth Stereo Headset with Charging Box Dock Earbuds Hands-free Mic earphone for Smartphones
Bluetooth Version:V4.1+EDR
Bluetooth Chipset Model: NDC 1510H
bluetooth model:A2DP,Headset,AVRCP,HSP,HFP,
Communication : Wireless
Play the Current: 14-25mA
Speaking Current: 15-25 mA
Standby Current: 0.64-2.2mA
operation miles: >10m
talking time:>2hrs        
music time: >2h   
Standby Time:>40 hours  
chipset specification:401215 55mAh 3.9V
Sise: 25.5X21X25mm and 91X44X33.6mm
Fetures:
1,Wireless and dual;
2,Wireless charging base
3,Only left channel can talk,the right channel will mute when using two headsets simultaneously
4,It can automatically separate the left and right channel mode when transfer the music.
Packing with original gift box