On the top left side of the alarm panel you will see three signal icons. RF Radio Antenna Icon, Sim Card Signal Icon and a Wi-Fi Signal Icon.
RF Radio Antenna Icon - The motion sensors and door/window sensors communicate with the alarm panel using 433hz RF (Radion Frequecy) signals. More Info
Sim Card Signal Icon - Sim card signal will display when you have inserted a Sim Card into the Sim Card Holder, located on the back panel. More Info
Wi-Fi Signal Icon - The alarm panel uses wi-fi to communicate with your cell phone or tablet. When an alarm is triggered the larm panel will send a notification to your phone. More Info
How to turn on Alarm Notifications for your OSI Alarm System