Product information: 1. The product weighs 4g and is super light 13mm super small Comfortable and lightweight to wear And easily hide in your ears 2. Wear. Very free Ergonomic design left and right ears can be worn freely, allowing the ears to take turns to rest 3. It can be used without picking the model with Bluetooth Compatible with most Bluetooth-enabled devices on the market, mobile phones, Tablets, etc. can be easily connected 4. Button function upgrade Double click to switch to the next Safe switching when driving, portable switching for sports, free switching during class Switch to the next song and no longer use your phone to operate it