The headset can easily and quickly connect with smartphones, tablets, TVs and other devices within feet. The foldable design makes it easy to store them when not in use or during travels. Adopted advanced 4.0 technology and fast pairing function, when high connecting, bring higher-quality stereo . Delivers deep, at any volume, making them the best wireless headphones available. Features - Color: Black . - Material: Plastic. - Size: 18.5x18x8.5cm / 7.3x7x3.3inch. - version: 4.0. - protocol: A2DP 1.2 / AVRCP1.4 / HSP1.2. - : 40mm. - Operating range: 10M. - Battery capacity: 320MAH. - Talk time: 6 hours. - Standby time: 72 hours. - Cable length: 100cm. - Sensitivity: 103 plusmn; 3db. - Impedance: 32 ;. - Frequency response range: 100-10000Hz. - The foldable design makes it easy to store them when not in use or during travels. - breathable ear muffs and Flexible Headband makes it a pleasure to wear for long time. - Adopted advanced 4.0 technology and fast pairing function, when high connecting, bring higher-quality stereo . Delivers deep, at any volume, making them the best wireless headphones available. Stream your music wirelessly up to 10m/33ft. - Our wireless headphones were designed to not only look awesome, feel great can wear them for as long as you desire. - With an attached audio cable, you can still enjoy favorite music when the battery is flat. Package list: 1 x Headphone Foldable Headset .0 On-Ear Design Stereo Bass Headset (Black )