Features: 1. Efficient Alarm: Even a slight vibration can trigger the alarm, more sensitive, can be a good protection of your property and items. 2. Wide Application: Wired rolling shutter door magnetic alarm can be used for different types of doors such as rolling gates and rolling shutter doors. 3. Easy Installation: No need for complex circuit connection, just simple installation can be enabled, providing you with convenience. 4. Strong Adsorption Force: The magnet end uses strong magnetic glue, and the induction is more sensitive. 5. Anti Theft Function: Effectively prevent theft and intrusion, to protect the security of the home and the store, is a very practical tool. Specification: Item Type: Door Magnetic Contacts Switch Sensor Weight: 168g/5.9oz Sensing Distance :50-70mm/2-2.8in Material: Aluminum alloy silver gray plating Suitable for Working Voltage: 12V Applicable to Working Current: ≤500ma Contact Mode: (NC\NO) Normally closed Installation Mode: buried, surface installation Scope: Applicable to all kinds of rolling shutter doors Package List: 1 x Magnetic Contact Switches 4 x Screws 1 x Accessory Features High Voltage Protection: The 2.5mm² alloy core double layer insulation design effectively prevents the risk of electric shock, providing security protection for the electronic fence. Stable Performance: Silicone insulated sleeve and alloy wire inner core are resistant to damage, with a maximum voltage of 15KV and a 5mm diameter, ensuring reliable applications with the multi-strand 7 core wire. Strong Reliability: Pulsed high voltage grid accessories provide a stable current, ensuring the normal operation of the electronic fence, with a robust construction providing strong protection. Long Lasting: Premium alloy core and silicone sleeve material are anti-aging, suitable for a variety of outdoor environments, allowing long term use without worrying about line cracking or damage. Multifunctional Application: Suitable for anti-theft alarm fences and widely used in agriculture, animal husbandry, garden, and other fields, providing a stable user experience.