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GA01P Mini Smart Power-off GSM SMS Phone Alarm Module

$31.01
1. The input is a switch signal. When the input port is short-circuited to the ground (GND), an alarm message
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GL09 PLUS Low Standby Power Consumption 8-channel Monitoring GSM Alarm Module

$59.75
1. Low-power sleep mode design 2. One way alarm voltage output 3. It can detect the voltage of the battery
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