TFA Climate Guard, Digital thermo-hygrometer, Monitors temperature (-40 up to +70°C): accuracy ±1°C, Monitors humidity (1 up to 99% RF): accuracy ±3.5%, Displays highest and lowest values, Dew point, Wet bulb temperature, Acoustic and optical alarm function for all parameters, Ideal for controlling the room climate, Storage and test room conditions are according to ISO 9001, Dimensions: 105 x 105 x 45 mm, Weight: 150 g, Incl. 2x AAA batteries 1.5 V