The SP-20M is intended to be used in conjunction with activity monitoring operations managed by TeleAlarm Carephones or for transmission of specific events.
The SP-20M can be activated by the movement of a magnet, or by the opening of an electrical contact. When the top housing is removed, a tamper switch detects this event, which is then transmitted to the Carephone.
![Sp-20M_1 (2)](https://www.telealarm.com/wp-content/uploads/Sp-20M_1-2.png)
SP-20M Wireless door sensor Features
![Sp-20M_2 (2)](https://www.telealarm.com/wp-content/uploads/Sp-20M_2-2.png)
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