COWIN E7 Wireless Bluetooth Headphones with Mic Hi-Fi Deep Bass Wireless Headphones Over Ear, Comfortable Protein Earpads, 30 Hours Playtime for Travel Work TV Computer Phone - Black Proprietary 40mm large-aperture drivers.You can enjoy the precise guitars,,crisp percussion,clear vocals and bass ,which will help you discover the best sound that brings out your music-including subtle details you have never noticed Equipped with professional ear pad made of protein and 90 swiveling ear cups.More durability,high-quality,skin texture, lightweight, Which make it comfortable for customers to wear the headphones for 24 hours.And pay attention that you'd better take off the headphone every 2-3 hrs to get your ears relaxed and comfortable Built-in microphone with high quality and powerful bluetooth function. - The customers can take calls under wired. And The over ear headphones also support volume control and switching up playlist.What's more,you can require quick and stable connection with your bluetooth devices or others via bluetooth adapter 30 hours playtime per charge at Bluetooth mode. A built-in 600mAh battery won't allow your headphones power off.So you can enjoy your world without noise for 30 hours.Don't need to worry the power shortage problem on the long travel 18-month warranty and quick response & friendly customer service. We will try our best to provide you with quick response and friendly customer service, which will always serve for you and certainly satisfy you