Description:Model: KR-DO26Launch distance (open place): 100 metersTransmission frequency: 433MHZWorking voltage: 12VAlarm output: alarm report, anti-dismantling reportInternal battery: 1 12V/23A alkaline battery Specifications:Wireless door sensor detector, guarding for doors and windows, for safety protectionIntelligent matching of various alarm hosts, built-in 433MHz imported wireless module, fully compatible with various 433MHZ alarm hosts and on-site alarm equipment in the marketThe tamper-proof design is very safe. The tamper-proof button on the back is designed. When the transmitter is dismantled, the tamper-proof button will be triggered, and the indicator will flash instantly, and an alarm signal will be sent to the host immediatelyWidely used, suitable for all kinds of doors and windows, as long as there are doors and windows, and where there are hidden safety hazards, it can be used, iron doors, wooden doors, glass doors, etc.The working principle of wireless door sensor: After the door sensor is paired with the host, when someone opens the door and window (the magnetic stripe is separated from the transmitter), the transmitter immediately feeds back to the host, and the host immediately calls/sends text messages to notify the host Package Included:1 pair of door sensors, 1 pair of stickers