Introducing a total walk-in solution for Food Safety and Energy Savings... The greatest detriments in the daily operation of walk-in coolers are doors left open and lights left on resulting not only in loss of energy but also in the compromising of food safety. Weiss Instruments is proud to offer theB79/ XWA11V compact and easy to use monitoring system Features: Hi/Low temperature alarms w/delays Lighting management - Auto on/Auto off Door open alarm Panic alarm option Saves energy 120VAC direct power - UL Listed 8A alarm relay 16A light relay Battery back-up option Phone dialer option Loud outboard buzzer option J-Box or wall mounting box option Adjustable settings - optional programming HOT KEY B79/XWA11V Kit includes 8Ft. probe (can be extended to 300ft.) 9V Battery back-up harness (battery not included) Loud outboard buzzer Pre-wired Wall Mounting Box SST waterproof switch plate Magnetic Door Switch