Bluetooth Version: V4.2

Receiver Distance: Up to 10 meters 

Play Time: Up to 12 hours

Frequency Response: 20Hz-20kHz 

Charging Time: 3 Hours

Charging Voltage:DC 5V

Active Cancellation:Up to 15~20dB between 100~1kHz

Support: TF/Micro-SD card

Battery:Rechargeble Lithium-battery(3.7/400mAh)

Charging:Micro-USB

Functions:Bluetooth, Calling, Aative Noise Canceling, AUX, USB, Sensitivity Microphone, Volume Control, etc.

Color: Black