Features:
Active noise cancelling
Rotatable design
40mm driver
Ergonomic design
Comfortable fit
High-Fidelity true-to-life sound
Wireless & Wired modes 2 in 1

Specifications
Wireless version: Bluetooth V4.0
Supported profiles: HSP, HFP, A2DP, AVRCP
Driver size: 40mm
Frequency Response 20Hz-20KHz
Headset size: 23*21*6cm
Headset weight: 200g
Battery:  350mAH
Charging time: Approx. 3 hours
Standby time: 170 hours
Working time (wireless mode): 12-20 hours
Working time (wired mode):  +∞ hours

Packing list                                                             
1* MAYOGA AHC Wireless Headset
1* Micro USB Cable
1* User Manual
1* Carrying Case

Note:
Usage hours may be different depending on the settings and conditions of use.
The built-in mic and control buttons can't be used in wired mode.
Please take off the headphone every 1-2 hrs to get your ears relax and protect them from lasting muggy environment in use.
Ambient noise can be reduced, but not eliminated completely.
ANC mode can be activated in BOTH wired and wireless mode when battery power allowed.
ANC works best at reducing consistent Low Frequency ambient noise, e.g. engine sounds, motor noise. Ideal for airplane / travel / lawn mowing.
ANC is not as effective for sudden, irregular noises, car horns, shouting, screaming, etc.
ANC may not work in very quiet environments, or some noise may be heard
If the headphone battery is depleted, you cannot use the ANC function.