Overhead Garage Door Sensor, Wired Alarm, Magnetic Contact Sensor with Strong Magnet Adsorption, Roller Shutter Security Alarm with High Sensit

Efficient Alarm: Even a slight vibration can trigger the alarm, more sensitive, can be a good of your property and items. Wide Application: Wired rolling shutter door magnetic alarm can be used for different types of doors such as rolling gates and rolling shutter doors. Easy Installation: No need for complex circuit connection, just simple installation can be enabled, providing you with convenience. Item Type: Door Magnetic Contacts Sensor Weight: 168gCelsius5.9oz Sensing Distance :50-70mmCelsius2-2.8in Material: Aluminum alloy silver gray plating Suitable for Working Voltage: 12V Applicable to Working Current: less than 500ma Contact Mode: (NC\NO) Normally closed Installation Mode: buried, installation Scope: Applicable to all kinds of rolling shutter doors