These over ear headphones have Adaptive noise cancelling technology combined with Bluetooth® 5.1 wireless operation giving you a stunning listening experience. These headphones offer crystal clear sound performance with dynamic sound and strong deep bass reproduction, with a built-in rechargeable battery that provides continuous playback of up to 6 hours. The adjustable head band and super comfy foam ear pads provide premium comfort, while built-in controls keep control at your fingertips. 3.5mm audio input also provided for use with non-Bluetooth® devices. Includes 3.5mm to 3.5mm auxiliary cable, USB charging cable.

Features:
• Active Noise Cancellation
• Bluetooth® v5.1 Wireless Technology 
• Rechargeable Battery
• In-Built Microphone
• 3.5mm Auxiliary Jack 
• In-Built Controls
• Speaker:?40mm Dynamic type 
• Battery capacity:3.7V/400 mAh
• Charging time:about 2~3 hours

Playback Time:
   Noise Cancelling Only: up to 12-15Hours
   Bluetooth® Only: up to 12-15Hours
   Noise Cancelling & Bluetooth® On: up to 6-12Hours