Wireless Window Door Sensor Detector Alarm Alert System

【Door and window contact sensor】: If the door and window are suddenly opened, the magnetic door and window detector from KERUI emits a loud alarm with a volume of 120 dB. It can prevent your child from sliding out or intruders from entering. 【Four alarm modes】: There are 4 different alarm modes: Normal alarm mode: the alarm lasts for a minute when you open the door; Doorbell mode: "Ring", once as a welcome tone. Alarm stop mode: Loud sound when opening the door and loud sound when closing. Command Prompt Sound Mode: Prompt Sound, Instant Beep From soft to very loud, a sound will be played repeatedly to remind you that the door is open until it is closed. 【Easy Installation】: The contact sensor of this safety kit is equipped with a self-adhesive pad, so no tools are required. Simply to use Door Windor Sensor KIT For Choose

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