Home security alarm: magnetic door and window alarms emit a loud 130 decibel siren when doors and are suddenly opened. It prevents your children from sneaking out of the door or intruders from entering Four alarm modes: There are 4 different alarm modes: 1. Alarm mode when door is open. 2. Anti-theft mode for valuables. 3. Doorbell mode: ring "Ding " as a welcome sound. 4 SOS modes Alarm with remote control: A door sensor alarm is equipped with 2 remote controls. Arm mode, SOS mode and deactivation mode, controlled by the remote control Various occasions: magnetic door alarm is small and suitable for many occasions. You can install it on the front door, back door, garage door, window, cabinet, drawer or anywhere you want to know if it is open Easy to install: Easy installation with the adhesive tape we provide. Please make sure the sensor and magnet are aligned and the distance is less than 15mm. Waterproof Door Window Burglar Outdoor Alarm Sensor Wireless Remote Control Anti-Theft Alarm System Kit Home Security Door Open Detectors,Long Battery Life Colour:Black Material:ABS Package Contents: 1 set x Door Window Burglar Alarm Sensor (2xAA batteries are not included,You need to prepare yourself) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.