Feature: 1. Working Condition: With a maximum switching voltage of 100V DC, a maximum switching current of 0.5A, a maximum switching power of 10W, and a drive distance of 10‑20mm. 2. Contact Type: Magnetic door switch has 3 contact types, NC/NO/COM, NC means normally closed, NO means normally open, easy to select and install. 3. Enhanced Security: The door switch offers an advanced level of security, can be used for home security and burglar alarm system, is the ideal choice for home, factory wood doors and Windows. 4. Fireproof: Made of fireproof ABS and magnet material, this magnetic switch is fire retardant, safe and stable, strong magnetic, responsive and provide long lasting performance. 5. Note: The switch cannot be directly connected to the power supply, and needs to be used in conjunction with the alarm system to provide switching signals. Specification: Item Type: Magnetic Door Switch Material: Fireproof ABS, Magnet Maximum Switching Voltage: 100V DC Maximum Switching Current: 0.5A Maximum Switching Power: 10W Contact Type: NC/NO/COM (NC: Normally Closed, When magnets are drawn together, the circuit opens; When the magnets are separated, the circuit does not conduct; NO: Normally Open, When the magnets are separated, the circuit opens; When the magnets are together, the circuit will not conduct.) Drive Distance: 10 ~ 20mm / 0.4 ~ 0.8in . Package List: 2 x Sensor Switch 2 x Magnet Blocks 8 x Screws 1 x English Instruction Manual