Product Description 1. Bluetooth + MP3 function supports stereo music playback, phone calls... Supports all audio devices that have Bluetooth capability, such as mobile phone, tablet, laptop, computer, etc. 2. 3.5mm audio jack, provides an easy wired connection of a variety of devices without Bluetooth. Allows you to answer or reject phone calls anytime, anywhere. 3. USB charging, rechargeable battery, convenient and practical. Play time up to 8~9 hours, and continuous talk time up to 8 hours, standby time up to 250 hours. 4. Good quality, foldable design and hinge with adjustable length, very comfortable to wear and easy to carry. Best choice for listening to music, watching movies, chatting online, etc. 5. with SD card inserted, without any Bluetooth device, still can enjoy music anytime anywhere. Cool shinning outlook gives the fashionable feeling. Quantity included in this product: 1 pc. Due to reasons such as photography, display and light, product images may have different degrees of slight color difference on different monitors