Features:
Adopting BT 5.0 technology, it brings you high speed of data transmission, stable connection and low power consumption.
Built-in 50mAh battery in each earbud, can be charged automatically in the 2000mAh charging case, supporting about 4-5 hours of working time when fully charged.
With a USB port, the 2000mAh charging case with digital power display can also charge for your smartphones, tablet PC, and other USB-powered devices.
High-definition microphone with CVC6.0 + DSP intelligent noise reduction technology deliver clearer and more real talking sound in stereo mode.
Ergonomic design fit well to your ear canal and provide you long time wearing comfort.
Wireless dual ear design, left and right ear channel separation. You can use the headset solely, or used them in pairs.
Specifications:
Model Number: M18A
BT Version: BT 5.0 +EDR
Frequency Range: 100-10000Hz
Sensitivity: 110±4dB
Impedance: 32Ω
Transmission Distance: 10m/33ft
Charging Case Capacity: 3.7V 2000mAh
Earphone Battery Capacity: 2 * 3.7V 50mAh
Working Time: about 4-5 hours 
Charging Time: Headphone charging: 1-1.5 hours, Charging case: 2 hours
Color: Black, White(Optional)
Package Size: 10 * 8 * 5cm / 3.9 * 3.1 * 2.0in
Package Weight: 140g / 4.9oz
Package List:
1 * Pairs of Headphones
1 * Charging Case
1 * Charging Cable
1 * Pairs of Earcap
1 * User Manual