High Definition Film :The bicycle computer protection cover features a high definition film, ensuring clear and images of your ride data. Versatile Compatibility :Designed for Brtton rider 320 420 stopwatch, this protective case offers versatile compatibility, making it a universal accessory for your bicycle computer. Silicone Material :Crafted from silicone, this protection cover provides robust protection against scratches, drops, and daily wear and tear, extending the life of your bicycle computer. Easy Installation :The bicycle computer mount boasts easy installation, allowing you to securely attach your bicycle computer without any professional tools or complex procedures. Compact Design :Its compact design does not interfere with the normal operation of your bicycle computer, ensuring you can continue to monitor your ride with ease. Weight: about 20g and high quality. Made of high-quality materials, . Silicone computer protective cover, anti-drop cover, free high-definition film, suitable for brtton rider 320 420. Colour:Black & Transparent Material:Silicone+TPU Package Contents: 1 * Bike GPS Protect Cover 1 * Bike GPS Protect film 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.