Features 1、Monitors the opening and closure of doors and windows 2、Normally closed with contacts are apart 3、Accuracy is accurate and reliable 4、With fine workmanship and excellent quality, it can be used for a long time 5、Ideal for metal door, window, commercial applications and where a wide interval is needed Specification Features: Monitors the opening and closure of doors and windows. Normally closed with contacts are apart. Accuracy is accurate and reliable. With fine workmanship and excellent quality, it can be used for a long time. Ideal for metal door, window, commercial applications and where a wide interval is needed. Specifications: Type: Normally Closed Color: Silver Sensing distance: 23-35mm / 0.98-1.38inch Max withstand power: 10W Max withstand voltage: 100V Max withstand current: 0.5A Shell material: Zinc alloy Thread: 24AWG 320mm / 12.6Inch Weight: Approx. 43g Package Included: 1pair x Magnetic Switch Note: When the door magnetic switch and the magnet are combined, they are turned on and disconnected separately, so as to remind customers to prevent misunderstandings. Package List