Welcome to wangbingdedian. We will provide you with satisfactory after-sales service. If you have any questions after purchasing the item, please contact us in time. We will reply within 24 hours and solve these problems for you. Features: 1. The earphone body is about 10.6mm thick, which naturally fits your earpiece, and it is not easy to cause pain when worn for a long time. 2. Using a group of low-power modules, it can be used continuously for up to 7 hours and the battery compartment can charge the headphones about 3 times. 3. Built-in high-sensitivity microphone allows binaural high-definition calls, and intelligent noise reduction can effectively reduce external sound interference. 4. Bluetooth 5.2, synchronous transmission between left and right ears, lower latency, comparable to the non-feeling delay experience of wired headphones. Specification: Bluetooth version: 5.2. Charging interface: Type-C Charging time: 1.5 hours Headphone playing time: 7 hours Standby time: more than 240 hours. Transmission distance: more than 10m Package includes: 1 x mini wireless headphones. 1 x USB data cable. Notice: Due to different monitors and lighting, the picture may not reflect the actual colour of the item. Thank you for your understanding.