With Remote Control The door alarm sensor comes with a remote control, you can use it to arm and disarm the door alarm, and set up disarm, arm, buzzer, alarm and emergency, the maximum control distance is 15m without interference.Easy to Install Window alarm sensors equipped with double-sided adhesive tape specially designed and installed for the magnetic door anti-theft device, so no tools are required, just stick the adhesive tape on the back of the alarm and magnetic strip, then stick the alarm and magnetic strip on the door or window.130dB Loud Alarm Door and window alarm built in a high-volume alarm horn, a 130-decibel alarm will sound when the door or window opens, this sound can scare the thief forcefully, prevent children and pets from entering. babies from secretly leaving the house, protecting your home or office whether you are inside or outside.3 Alarm Modes The door window alarm system has 3 alarm modes, they are doorbell mode, anti-theft mode and reminder mode, they have 3 different voices, you can change 3 alarm modes by remote control according to your daily needs, it is very convenient.Low Battery Indicator This door window burglar alarm has low battery indicator function, when the battery voltage of the door alarm is lower than 2.4V, the door alarm will make a "DiDi" sound to remind you to replace the battery, the alarm is powered by 2 AAA batteries (included).