Size ConversionInchesCentimetersPlease according to your own measurements to choose your suitable size. The tags inside the items will show in our Asian (Type) size.Features:1. 9D Noise Reduction2. IPX5 Waterproof, no need to worry about water and sweat anymore3. Support Siri smart voice4. Automatic pairing5. Backup power, you can charge your phone6. Cold light smart LED power display7. Catching a movie and watching the movie more intimateSpecification:Color: Black, White(Option)Style: In-EarOutput voltage: 5V/1AEarphone battery capacity: 50mAh eachCharging box capacity: 4500 mAhLife time: About 220 hours (need to be used with charging box)Talk time: About 180 hours (need to be used with charging box)Compatibility: For iOS/AndroidPackage Includes:2x Earbuds4x Earbuds Cap1x Charging Case1x User Manual1x Charging Cable