The Yale Security Panic Button is suitable for the Easy Fit Alarm systems. It activates the house alarm when the button is pressed, making it ideal for attracting attention in the event of an emergency. The panic button can be fixed, or can function as a mobile panic alarm anywhere in the house. Radio: 868MHz FM. The pack contains: 1 x Panic button.2 x Wall plugs and cross head fixing screws.1 x CR2032 battery.