4 Pack Bluetooth Tracker for Keys Wallet Pets Luggage with Black White Keys Locator Smart Tag Finder Anti Loss Device 4 Item Finder - This key finder is very convenient for people to use. After downloading the app "Search", you can set it up on your phone. Long press means on/off. Search for Android and devices<br> EASY TO CARRY - We equip each key tracker with a buckle for easy carrying of keys or bags. When out of Bluetooth range, use the app to see your nearest location on a map.<br> Find your phone - when bluetooth is on, double tap the tracker's button and the phone will make a sound<br> Versatile - Great for keys, dogs, cats, school bags or purses. What a smart tracker! Once you have our key loss prevention, you will your belongings<br> Colour:black+white<br> Material: ABS<br> Package Contents:<br> 4 x Keys Locator<br> 4 x Ring<br> 1 x English manual<br> Only the above package content, other products are not included.<br> Note: Light 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.