Double Bass Clear Stereo Sound Bluetooth Wireless Headphones with Hands-free and In Headset Control - Studio Edition Foldable and Adjustable Ear Cups that fits securely and comfortably Built-in hands free and full control buttons Up to 10 hours talking and up to 6 music and only 2-3 hours for charging Bluetooth 3.0 +EDR, 33 feet working distance Suitable for any device with Bluetooth and/or with 3.5 mm jack (wire included)