Zoweetek Professional Active Noise Cancelling Sound System Technology Design:H01A Active Noise Cancelling Headphones •Comfortable Design: Air-quilted leather, adjustable headband and ultra-soft cushioned earcups guarantee the unparalleled comfort and extended wear. •Folding Design: circumaural earcups fold inward, portable to stash away. Bluetooth 4.0 and Apt-x Code provide the headphones crystal clear and high-fidelity sound. •Built in Mic, take phone calls hand free. •All Headsets are performance tested and vetted through our rigorous quality inspection process to ensure reliability. •Universally compatible with all of your devices, including PCs and Macs / iPhones and iPads / Android smartphones and tablets. •Automatically indicates the remaining battery life of the Bluetooth device on your iOS screen! Specification Bluetooth Version: V4.0+EDR; Bluetooth Chipset: CSR Support profile: A2DP1.2/AVRCP1.4/HSP1.2/HFP1.6/CVC6.0 Product Size: 17.6 x 16.6 x 6.5(CM) Ear Coupler Type: Protein leather Earmuffs Over-15dB noise reduction; Standby time : 22 days Music playing time:14 hours; Talking time:14 hours; Charging time: 2-3 hours Support music transform, hands-free function 10m distance,Class II,Compatibility:Work with any bluetooth enabled devices. Built-in Microphone: Yes; Battery type: rechargeable lithium battery 270mAh Adjustable headband is designed to fit precisely on the ear, delivering a snug fit that is comfortable and precise. Package contain: 1* Wireless Headphone 1* Audio Cable 1* USB Cable 1 * User manual.