Napoer Foldable Wireless Bluetooth Headphone Stereo Earphone for iPhone 6 Plus 5S iPad Samsung Galaxy S5 HTC Blackberry Blue Steady Bluetooth 4.0 single, you can enjoy the convenience of wireless communication. Built-in battery supports an access to quickly charge, and long standby time and service life, raising your utilization efficiency. Foldable and stretchable, convenient to carry and adjust suitable size. External noise relief technology and stereo provide a personal music world to you. Convenient to answer calls when listen to music, without removing headphone, only press the answer key on the side.