Ultra-slim tracking card with a sleek profile. This wallet tracker card is approximately the size of two credit cards and less than 2mm thick. Place it in your wallet or luggage tags to help locate missing items. Works with the Apple Find My app. If the smart card moves out of Bluetooth range with your iPhone, you will receive a notification. It can be tracked without a distance limit to help prevent loss, as long as there are other iOS devices nearby. Lost Mode can be enabled by entering your contact phone number. If the device has been disconnected from your phone and another Apple device is near it, you will receive notifications with its latest location. Features wireless charging with up to four months of battery life. No special charging cable is required. The card is reusable and built to last. Compatibility: For Apple devices (iPad, iPhone, Mac) and works with the Find My app. Does not work with Android devices. Battery: Built-in lithium battery, 100mAh. Battery is not replaceable. Charging method: Wireless charging. Volume: 70-90dB. Weight: 12.6g. Standby time: 3-4 months. Supported system: iOS 14.5 and above. Required app: Apple Find My. Color: Black. Material: Plastic. Size: 85 x 54 x 1.8mm. Package Contents: 1 x Smart Track Card.