Supco TA33 Single Set Point Temperature Alarm with Digital Display and Battery Backup, -40 to 160 Degrees F, 120 VAC Adjustable range from -40 degree F to +160 degree F (-40 degree C to +71 degree C), back Lit display 90 db audible alarm, adjustable alarm temperature ranges Built-in terminals for remote alarm or telephone dialer connection, switch for 'no delay' or '1 hour delay' Used in food markets, convenience stores, supermarkets, restaurants, florists, greenhouses, laboratories, pharmaceutical storage facilities, refrigerated transport, cold storage facilities Measures 4-51/64" length by 1-25/64" width by 3-3/16" height; 1 year warranty