1. Bluetooth 4.1 &EDR technology – Compatible with all Bluetooth-enabled devices. Instantly connected to your smartphone or tablet from up to 33 feet away.Support life waterproof, waterproof grade is IPX6
2. ∴ How to change the language : when you are not connect the earbud to your bluetooth system ,press the button more than one second ,then you can change the language to your want
3. The battery provides up to 5-6-hour music or talk time and up to 120-hour stand-by time .
4. Simple and fast coupling with smartphones, tablets and other Bluetooth devices. You can connect it to up to 2 smartphones
5.light and comfortable : The weight just 3.5g, very comfortable to wear and new in ear design, snug and secure, will not cause ear swelling.The Bluetooth headphone is Suitable for sports and outdoor activities