Feature: 1. WIRELESS CONNECTIVITY: Adopt advanced wireless technology to connect quickly and stably to your monitoring system without cumbersome wiring. 2. REAL TIME ALARM: Protect your home with open and closed door detection. When the door or window is triggered, you will receive an alarm signal. 3. HIGH SENSITIVITY: Accurately sense the opening and closing of doors and windows, even small movements can be accurately detected, reducing the false alarm rate. 4. LONG LASTING DESIGNED: Made of high impact resistant materials, it is shockproof and drop resistant, ensuring long lasting durability and reliability. 5. HIGH SECURITY: Not only support opening and closing door alarms, but also anti violent disassembly alarms, when violently disassembled, you will immediately receive a reminder. Specification: Item Type: Wireless Door SensorMaterial:ABSLaunch Distance: (Open space) 100m/328ft Working Voltage: 12VTransmission Frequency: 433MHzAlarm Output: Alert message push, anti disassembly alarm push Application: Home, office, hotel, apartment, villa Battery: 50mAh 12V 23A lithium battery (built in). Package List: 1 x Door Magnetic Detector1 x Magnetic Stripe1 x Door Magnetic Detector Gasket1 x Magnetic Stripe Gasket4 x Screw1 x Instruction Manual