It is necessary to insert SIM card and match it with the thinker's host. It will send a message or call to remind the host that the security devices at home is triggered to ensure that the security information is received when network stop working, once the security device is triggered.
Support host: Thinker/Thinker pro
Card type: SIM card
Working temperature: 0-40 ℃
Working humidity 10% - 80% RH (non
condensing)