1. Ultra-Slim - The Most Sleek Tracking Card Anywhere. The Wallet Tracker Card is the size of about two credit cards - less than 2mm thick - and the slimmest tracking card on the market. Place it in your wallet, luggage tags and more to locate your missing items. 2. "Find My" Network Location - Works with Apple Find My App. When the smart card is out of Bluetooth range from your iPhone, you will receive a notification on your iPhone. It can be tracked without distance limit to help prevent loss, as long as there are other iOS devices nearby. 3. Lost Mode Enabled - Enter your contact phone number. If the device disconnects from your phone for an extended period and another Apple device is near the tag, you will receive notifications and the latest location of the smart tag. 4. Wireless Charging with up to 4 months of Battery Life - No special charging cable required. Reusable and built to last. The card lasts up to 4 months on a single charge, so you don't have to worry about weekly recharging. Compatibility: For Apple (iPad/iPhone/Mac) works with "Find My" App Does not work with Android devices. Battery: Built-in Lithium Battery, 100mAh Battery Replaceable: No Charging Method: Wireless charging Volume: 70-90dB Weight: 12.6g Standby Time: 3-4 months Supported System: iOS (iOS 14.5 and above) App: Apple Find My Color: Black Material: Plastic Size: L85 x W54 x T1.8mm Package Contents: 1 * Smart Track Card 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 to appear slightly different from the real thing. Measurement may vary by +/- 1-3cm.