Product description: If you think there are lost objects nearby, but you can't find them, click the doorbell button on your mobile phone and then listen to the familiar doorbell to the volume you have set. The anti-loss locator supports IPX5's waterproofness, so you don't have to worry about it being damaged by rain or splashing. Simple operation: first step, press the power button of the device to turn it on, second step: open the "find me" app and add the device, third step: name of the project that needs to be tracked and start using it after completing it. NOTE: Works only with ios, not with android. What's in the box? 1* Anti-loss Locator