The Smart Home Starter Kit Plus combines benefits of the Starter Kit with the extra peace of mind of a loud siren to scare off intruders. The Hub, Motion Sensor, Window/Door Sensor and Indoor Siren are easily networked wirelessly via a free app on your smart device, sending any alerts of triggered sensors to you wherever you are. It is easy to set up, safe & secure with no monthly fees. Add up to 4 cameras and 50 sensors to the system. Panasonic smart home uses dect ultra low energy (ule) wireless standard to offer a stable, interference free, superior range. It is extra safe as it is an invisible to regular consumer products and only pre-paired smart devices can access the system giving you added peace of mind. Easy to use app, one push pairing, no monthly fees. Easily expanable system with a range of additional accessories available. Compatible with iOS and Android operating systems. App needed for use: panasonic home network. Operates over mobile internet. Operates over wi-fi. Requires wireless router for use. Detects occupancy. Sets schedules for devices. Components include 1x motion sensor, 1x window/door sensor, 1x hub, 1x siren. Batteries required 3 x AA (included).