Features:
Bluetooth headset， compatible with Bluetooth enabled devices， such as mobile phone， tablet PC， etc.
Built-in microphone， allows you to have wireless telephone conversations.
Bluetooth 4.0， support HSP/HFP/A2DP/AVRCP， connect two Bluetooth equipments at the same time..
Support NFC， Acoustic answered and hung up， broadcast calls number function. 
Build-in stereo speaker， high quality rich sound， good choice for listening to music， talking on the phone， etc.
You can see the condition of Bluetooth headset battery from for Xiaomi and for iPhone.
Build-in li-battery， charge via USB cable within 2 hours.
In-ear design， lightweight and portable.

Specifications:
Color: Black + Silver
Bluetooth: Bluetooth 4.0 CSR8610    
Bluetooth profiles: HSP / HFP / A2DP / AVRCP
Material: ABS
Effective range: about 10m / 33ft
Standby time: about 130 hours
Phone talking time: about 10 hours
Music time: about 4-5 hours
Charging time: < 2 hours
Battery: 50mA
Item weight: Approx. 7g / 0.2oz
Package size: Approx. 9.5 * 7.5 * 2.5cm / 3.7 * 2.9 * 0.9in
Package weight: Approx. 37g / 1.3oz

Package List:
1 * Bluetooth Headset
1 * Earphone
1 * Ear-hook
1 * USB Charge Cable
1 * User manual