Track your items anywhere in the world via maps Forgot your stuff, get notified immediately with Find My app. Helps you find lost items without having to worry about them being hidden in cluttered furniture It is compatible with all wireless charging devices and lasts up to 4-5 months per charge Hign-concerned Chemical:None Model Number:Wallet Tracker Card Battery capacity:230 mAh Charging method:Wireless charging Supported system:for ios Colour: A black Material:ABS Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * Tracking Device 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.