Over Ear Headphones with foldable design and adjustable length hinges, very comfortable to wear and easy to carry. These Stereo Headset supports Playing time about 3.5 hours, standby time up to 15 hours. Wireless Headphone with Wireless and MP3 function support stereo music playing, phone calling. Headset also with 3.5mm audio interface, provides a simple wired connection of a variety of devices without Wireless.