BT tracking Not afraid of losing items When the phone or other items cannot be found You can directly double-click the button to make a prompt toneWhen the item did not know where it fel Open the mobile APP to view you will know where it is droppedAutomatic alarm Prevent Ioss When the phone is more than a certain distance from the object, the object will Automatically sound the alarm to remind you to take back the lost itemsCompact in size, equivalent to a coin, it's easy to carry and can be conveniently placed in various locations.Two-way search Easily retrieve items Double-click the round button of the anti-lost device. the phone will automatically sound By clicking the alarm on the APP the item will automatically soundProduct parameter Product name: Smart object finderProduct net weight: 21gBT version: BT 5.0Product model: Y02Use system: IOS/AndroidStandby time: 6 monthsEffective distance: 15 metersBattery model: CR2032color:Blackmaterial: plasticPackage Contents:3 x smart object finders1 x Instructions in Chinese and English