Features: The wallet trackers card is incredibly thin, approximately the size of two credit cards and only 3mm thick. Easily slip it into your wallet, or other items to locate lost belongings effortlessly. Add your wallet finders to the find app on your devices compatible. Use wireless connection to finds it nearby or leverage the find networking navigation locator to track it globally through hundreds of devices. Receive notifications when you leave items behind, and use lost model to help retrieves them. The find app sends alerts, actively preventing the loss of your wallet. The thin navigation item finders boasts a battery lifes of up to 3 months and supports wireless charging, eliminating the need for special charging cables. It's reusable and builts to last. The intelligent card trackers is designing to withstands accidental spills, splashes, and even immersions, ensuring it remain functional no matter where your adventure take you. Specifications: Component:ABS Size:Approx.84x54x3mm/3.3x2.12x0.11inch Color:Black Net weight: 16g Battery capacity: 170mAh Is the battery replaceable: No Charging method: Wireless charging Connection method: APP Bluetooth-Compatible connection Operation instructions: Connect and use, no need to download APP, you can connect through built-in "Find" APP. Features: Global positioning, lost tracking, voice reminder, light and portable, dustproof Package Includes: 1pcs Waterproof Locator Card note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.