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 Wireless door sensor Features
Compact
Long battery lifetime
Automatic radio daily message

Low battery monitoring
Wired input
Tamper switch
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