Kept app can be connected with a camera device to monitor your cellphone.

When the device is beyond the settled distance from the cellphone,both device and cellphone would give out an alarrm to warm you;

When you lost your cellphone,the device can help you trace your cellphone by tapping the button on the device to make the cellphone create a sound;

Similarly,when you lost your device,you can find it by the app on your cellphone.

What's more,you can take a phone from romote operation by your phone.

The device is portable and convenient that you can keep it on your key ring、bag、wallet、school 、bag of children or anywhere on your pocket of old men.