Description: Rechargeable: 400mAh battery, 2 hours Fast Charing. supporting TF card.Also Compatible with all devices have 3.5mm audio jack, like smartphone, laptop, PC or the devices support Bluetooth. BLUETOOTH CONNECTION: Built to provide a quick and stable Bluetooth connection . Just slide the on/off button and the headphones will be in ready to pair mode. The Wireless Headphones are compatible with all Bluetooth or 3.5mm plug cable enabled devices. COMFORTABILITY : The Earmuff is made by soft leather, ensuring lasting comfort. They are foldable and stretchable, which allows you to find the perfect fit without constraint and excellent durability. it is the best choice for travel, sport and daily use by Unisex Kids, Teens and Adults. Comfort & Space Saving: Over ear ergonomic designed memory ensure long lasting comfort. The foldable Headband is not only designed for saving your desk space but for carrying in the provided carrying bag. Stereo Headphones: Stereo Headphones, specially developed software and noise reduction technology designed to makes you focus on what you want to hear and provides stereo sound, powerful bass, clear vocal, and crisp high tones. Specification: Transmission distance: 10-15 meters Battery capacity: 400mAh Standby time: about 365 hours Charging time: about 2 hours Voice prompt: support Use mode: Tf card Size Chart: 17x18cm/6.69x7.09inch Package Includes: 1 Piece Headphones 1 Piece Charging Line 1 Piece Audio Cable