The Altronix PT724A Annual Event Timer is an extremely versatile, 24 Hour, 365 Day Event Timer designed to support a wide range of applications: Home and Building Automation, Security, Access Control, Lighting Control, Etc. PT724A Annual Event Timer is equipped with an independently controlled form "C" relay contact that provides many latching and/or momentary operations during the program schedule of your choice. Events may be set for single or multiple operations on a daily and/or weekly schedule. EE Prom memory protects against loss of programming due to power failure.