Kerui Home Security Wireless Door Window Sensor Alarm 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 Product Features  【 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. This is a perfect wireless magnetic theft alarm that can keep children, homes, garages, mailboxes and businesses safe. 【 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 stick the alarm sensor to the door or window. It can also be used as a door stopper, pool door alarm, garage door alarm or sliding door alarm 【 Fast automatic switch 】 Adopts highly sensitive magnetic sensor design. The contact sensor group can quickly detect the state of the door or window. It is powered by two AAA batteries . 【 Built-in remote control button 】: Equipped with a remote control button, with arm and disable buttons, easier and more convenient to use. Product description Door sensors can be used in various modes, including as a shop bell or doorbell. Press the SET once to change the mode. 1. Door and window sensors alarm mode / standard alarm mode The door and window alarm secures your windows and doors against unauthorized opening with a 120dB loud alarm sound against theft and deter burglars. The alarm continues for 1 minute, even if the door is closed again. However, it can be stopped manually. 2. Doorbell mode A gentle “ding dong” can be heard when the door is opened - meaning you will be notified when your children are coming home or a customer is entering your store. After opening the door, the security doorbell only rings once. 3. Window / door alarm mode The alarm stops immediately after the door and window sensors are closed. Wireless Door Sensor Alarm for Child Safety - You can use the door alarm safety feature to keep your young children from going outside without permission. Technical parameter Model: KR-D121 Working voltage: 3.0V (powered by 2 AAA batteries) Standby current: <10uA. Working current: <80mA. Receiving frequency: 433MHz Alarm time: 60 seconds Alarm volume: 120DB Alarm Output: open the door and alarm after arming, and trigger the detector to alarm after arming Package includes 1 x D121 Door Alarm Sensor (battery not included) 2 x Remote Controller

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