Features: Silicone material: Craft from quality silicone material, it is soft and comfortable to fit the wrist, waterproof and sweat resistant. Adaptability: Specifically designing to fit shape and size of the location tracker, ensuring that it will not interfere with normal functioning and is easy installation and remove. Lost Prevention Function: The keychain design can be easily attach to key, bags, backpacks and other items. Easy installation: The design is simple and user-friendly, allowing users to easily install locators on the case without the need for additional tool. Loss prevention design: It can effectively prevent item loss, and monitor and track the location of the carried items at any time. Specifications: Material: Silicone Color: 19 color optional, refer to pictures to select please Size: about 3.8cm/1.49inch Applicable Model: for Loss Prevention Location Tracker Package Includes: 1x Keychain Shaped Silicone Case note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.