GBSCLOVER 10 Pair Magnetic Door Switch, NC Recessed Magnetic Switch Alarm, 300 mA Load Current Wired Door Sensor, Professional Wired Window Contact Sensor for Home Alarm System

["Performance: The wired window door contact sensor adopts an NC (normally closed) design, with an sensing distance of 15mm±5mm. The opening and closing status of doors and window can be accurately identified and the response is quick without delay","Installation is Simple: Wired door sensor does not require an external power source. Just connect the GND and N.C ports of the wired or wireless alarm control panel for installation. Door magnetic switch is quick and easy, saving time and effort","Principle: When the magnets of the alarm magnetic reed switch are closely placed together, the switch will closes. Then, when the magnets are separated, the switch will opens (the switch will disconnect when the magnets are close to each other)","Specifications: The switching voltage of the wired door window sensor is 100VDC, the load current is 300mA and the lifespan can reach up to 1 million times. Magnetic door sensor is not prone to damage even when used frequently over a long period","Application: The package contains 10 sets of magnetic reed switchs, specially designed for home alarm systems. The quantity is sufficient and can be used as backup storage or for simultaneous use at multiple locations (not applicable to iron doors)"]