About This ☀MATERIAL - The switch housing is made of ABS flame retardant material and reed switch, is resistant to high temperature and deformation. ☀NORMALLY CLOSED(NC) - When the switch is close to the magnet, the circuit is conductive(light on); when the switch is separated from the magnet, the circuit is not conductive(light off). ☀ACTUATION DISTANCE - 10mm transmitting distance. The contact has fast reflection and accurate detection. ☀WORKING CONDITIONS - When the magnetic door is energized, the voltage is controlled at DC 0V-24V and the supply current cannot exceed 1A. The load current is 150mA. ☀WIDE APPLICATIONS - Work with all access control and burglar alarm systems. Can be installed in wooden or aluminum alloy doors and windows. Overview Operation Mode : Off Operating Voltage : 24 Volts Contact Type : Normally Closed Connector Type : Crimp Brand : VictorsHome Switch Type : Temperature Switch Terminal : Screw Material : Aluminum,Wooden,Aluminum Alloy,Abs Item dimensions L x W x H : 3.15 x 1.18 x 2.76 inches Circuit Type : 1-way