Ranges -10 to +60°C (-14 to 140°F) and 10% to 99% RH resolution 0.1°C/°F, 1% RH. With built-in sensors and dual 12mm high LCD readout. The upper display shows temperature and the lower display relative humidity. A max./min. memory function is provided which allows the maximum and minimum recorded values for both parameters to be recalled and displayed, the user then has the option to reset. Overall 70 x 20 x 110mm W x D x H. Weight 113g. Wall or bench mounting. Supplied with 1 x 1.5V AAA battery.