1. Silicone strap design, carry with you for running/fitness/cycling, silicone portable buckle to carry with you, easy to go out 2. Lightweight, mini, light and more breathable, after thousands of experiments and research on human ear models, the in-ear angle is optimized to fit the ear structure better. 3. The new Bluetooth 5.4 module technology further reduces power consumption, bringing a more stable and smoother connection experience, easy to listen and play, no fear of lag. 4. 0.045s low latency with Bluetooth 5.4 chip, more stable transmission and smoother games, helping you to be one step ahead. 5. Small size and large capacity, online all the time in the morning and evening, high-performance battery + Type-C fast charging interface, so that you can have fresh music company all day long. Color: black/green/orange/blue/purple Bluetooth version: v5.4 Battery capacity: 28 mAh*2 Charging case capacity: 180 mAh*1 Gross weight per set: 150g Packing method: boxed Contains per set: 2 earphones, 1 charging case, 1 protective case, 1 wristband, 1 data cable