The Yale wireless key fob remote controls are for use with all Yale Wirefree alarms less than 4 years old as they operate on the 433.92 MHz frequency. Yale wireless key fobs allow you to control the alarm with one press on a button. Key fobs can be used to fully arm or part set (Home arming mode) & dis-arm your Yale Wirefree alarms. Yale alarm key fobs also benefit from having a dedicated panic button function that will raise the alarm in an emergency also ideal for multiple users. The key fob is powered for 2 years by readily available batteries. The control panel will identify exactly any alarm part with a low battery giving you two to four weeks to replace it. 30 m. Range Indoor 433.92 MHz operating frequency Pack 1.