<p>By clicking the alarm in the APP, the item will automatically sound Double click the round button of the anti-loss device, and the phone will automatically sound.</p> <p>When the phone or other items can not be found Double click on the anti-loss device, the phone will sound an alert tone.</p> <p>When the item doesn't know where it is, open the cell phone app to check it, and you can according to the map.</p> <p>When the phone is more than a certain distance from the item, the item will automatically sound an alarm to remind to get back the lost item.</p> <p> and compact, easy to pick up without effort.</p> <p>Product name: anti-loss device</p> <p>Bluetooth version: Bluetooth 5.0</p> <p>Use system: IOS\/Android</p> <p>Effective distance: 15 meters</p> <p>Standby time: 6 months</p> <p>Battery model: CR2032</p> <p>Type: Locator</p> <p>color:Black</p> <p>Material:plastic</p> <p>size:38 x 38 x 7mm</p> <p>Package Contents:</p> <p>1 x Locator</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>