Silent mode will mute the sound of the panel when arming/disarming and during delay time. The function can not be turned on continuously but is an option everytime you want to arm/disarm the system. To use the silent mode, press the home button on the remote and within 3 seconds the arm/disarm button on the remote. It’s best to practice a bit to know how to get the function working properly. In general you can check the LED on the remote. If it goes off after pressing the house button once, press the arm/disarm button to silently operate the alarm system.