The Blaupunkt Q3000 alarm system is connected to your router. The alarm system uses the Internet to communicate, so you'll always be able to check up on the alarm system with a PC, tablet, or smartphone. This starter kit consists of a main panel, window/door sensor, and a motion detector. Expand the set to include up to 40 sensors of your own choosing. The alarm system can be operated with the free smartphone app (iOS and Android). With this app, you also have the possibility to turn the system on and off. This way, you'll always have control over your alarm system anywhere and at any time. When one of the sensors is tampered with, an alarm with a 95-decibel audio signal will be triggered, and you'll be notified by the app.