Feature: Classical leather ear pad Improve the comfort of the pressure ear. Fold to Convenient storage. 4.1V lossless transmission. 3D Sound for your ear. Specification: Effective transmission range: 10m Battery: 300 mA Li polymer battery Playing time: 10 hours Stand-by time: up to 30 days LED indicator status: Blue LED for power and BT pairing indicator; red LED for charging indicator. Diameter of driver unit: 40 mm Bluetooth Version: Bluetooth 4.1 Battery: 300mAh lithium battery Charging Time: 2.5 hours Play Time: More than 10 hours Use Scope: 10m Features: Foldable and Portable / Retro Design Color: Black What's in the box 1 x Headphones