The Minimum And Maximum Temperature Are Shown On The Led Display And It Can Be Manually Reset. With Indoor And Outdoor Audible Alarm, When The Temperature Exceeds Your Preset Minimum And Maximum Alarm, It Will Make A Audible Alert. It Can Be Used In The Freezer And Act As An Indoor And Outdoor Thermometer.Comes With An Adjustable Hook So The Display Can Be Wall Mounted Or Free Standing For Tabletop Use . The Thermometer Includes 24 Hour Min And Max Temperature Records And Allows You To Easily Monitor Your RefrigeratorS Temperature Change And Provide Double Protection For Your Food Safety. After-Sales Warranty: Sanure Is Only Seller Authorized By Topincn . We Guarantee You Have A Good Shopping Experience. Please Feel Free To Contact Us At First If There Is Any Problem, And We Are Always Here To Help You.