How do clip alerts track users?

Clip alarm link mobile phone tracking use. Instructions for use of clip alarm:

1. Take the wild police monster hunting cloud alarm as an example. First, turn the switch of the wild police monster cloud hunting alarm to the other side of NO.

2. Plug in the switch of the cloud alarm, and insert the GPRS card into the self-elastic card slot.

3. Scan the QR code on the bottle or enter official website to set the alarm number and the name of the alarm person.

4. Turn off the alarm clock switch and wait for the alarm clock to send GPRS information. 5. The alarm alarms successfully by phone and SMS.