TOTAL COVERAGE: Keep your home on alert with the Home Zone Security Door Sensor Alarm System Kit. Connect the siren which doubles as a hub to your mobile device and sync the five door sensors to the siren to receive push notifications and trigger the 120 decibel alarm if your doors or windows are opened. CONTROL REMOTELY: Download the Home Zone Smart app to control your siren and sensors directly through your mobile device. Features include time scheduling, automatic push notifications, and manual arm and disarm of the sensor system to keep you in control even when away. EASY SETUP: Sync the siren and sensors in minutes to the app and DIY install on the doors and windows desired with no tools needed using the included double-sided adhesives (batteries included). NO SUBSCRIPTION NEEDED: Simple yet efficient DIY security solution with no additional subscriptions needed to operate. BUY WITH CONFIDENCE: Certified with FCC certification and 1-year product support.