This kit is all that you need to protect your home, monitor it from anywhere via your smart phone. The Kit included a Smart Indoor IP Camera (works on 2, 4G only) which has 2 way audio and motion sensor which acts as the Hub. Apart from IP Camera Host, it includes all wireless sensors such as 1 x PIR Sensor, 1 x Door Contact and 1 x Remote for Switch on and Off the Alarm. The Camera communicates with Sensors through RF868Mhz frequency whereas it communicates to your smart phone through WiFi. Very Easy to Pair and Install.