High accuracy fridge temperature monitoring of vaccines, medicines and food.Large LCD display simultaneously displays current and max/min recorded temperatures.Programmable high & low audible alarms.CalCheck 0.0 °C (±0.1 °C) function allows verification of thermometer accuracy.External sensor (s) simulate fridge contents temperature.Thermistor probe is encased in a sealed bottle. Top up with Glycol solution (50 ml bottle supplied) .Splash-proof IP54 ABS case with 'Biomaster' additive to reduce bacterial growth.Plastic wall bracket incorporates built-in foot stand, hook for hanging and screw thread for tripod mounting.European Standard EN 13485.