China TWS Bluetooth Headset factory These hd stereo sports headphones feature a foldable design, another commonly used design. Makes it easy to put in a bag. In terms of wearing, because the material is very skin-friendly, the feeling inside the head beam is the same, so even when it comes to wearing, the overall comfort is quite good. * Bluetooth version:5.0 * Standby time :120 hours * Charging time:2 hours * Effective distance :10-15m * Single weight:140g * Including packaging:262G battery:400mah Packing size :142*142* 19.5m Remark:Provide foreign trade for English version, large volume can be customized French, Japanese, German, Portuguese, Spanish, Russian, etc. The hd stereo sports headset comes with Bluetooth version 5.0. Not only is there more data transfer, lower latency and faster connection speeds than previous versions. Except the power button, the whole body has no other buttons, full touch gesture operation. After professional audio modulation, with a strong immersive experience. This makes it especially suitable for listening to rock music, or watching movies and playing games. Large ears have ample space and can use large battery for long battery life. When full, it basically lasts 3-5 days, so there's no need to worry about its lifespan. The headphones have a built-in400 mah lithium battery that gives them up to 52 hours of battery life, the pinnacle of battery life.China TWS Bluetooth Headset factory website:http://www.zlinck.com/bluetooth-earphone/tws-bluetooth-headset/