Dazzle life "Sound" you up:Y20 makes your helmet cool and cool Dazzle Color RGB lighting effect upgrade nano-coating waterproof, shock bass RGB Dazzling Lights: RGB cool breathing light effect, cool colorful, can switch 16 light effect mode to give life features, is a tool is a partner Craftsmanship more cool : New process upgrades, carefully developed cool appearance, hard shape so that you love cycling more 5.3 chips: Research and development of a new generationof Bluetooth 5.3 chips, motherboard upgrade, using nano-layer technology Suitable for a variety of helmets: Easy to install, suitable for a variety of helmets on the market Colour:Black Material:ABS Package Contents: 1 * host 1 * charging line 1 * Speaker Microphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.