Long-lasting battery: Battery provides over 6 months of standby time and can be easily replaced for long-term use. Real-time positioning: Track the location of your lost items or pets through the Bluetooth-compatible key tracker and mobile app. Waterproof and durable: The device is waterproof, making it suitable for outdoor use and ensuring its longevity. Multiple functions: Features such as electronic fence, tracking query, low power alarm, and silent care provide added convenience and security. Compact and portable: The compact design allows you to easily carry the key tracker in your wallet, bag, or attach it to your keychain, making it a versatile item finder. Item Name: Anti-Lost Tracker Material: ABS Applicable Objects: Pets, Keys, Backpacks, Suitcases, Headphone Sets Applicable Platforms: Fully Compatible Wearing Method: Hanging Wireless Distance: 15M Power Supply: 200mAh Bluetooth-compatible: 5.2 Features: Real-time Positioning, Waterproof, Long Standby Time Size Details: L: 38mm/1.5", W: 38mm/1.5", H: 6mm/0.24" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Anti-Lost Tracker