(1)Temperature measurement range:-50;;~70;;,-58¡§H~158¡§H (2)Humidity measuring range:10%RH~99%RH (3)Indoor emperature and humidity display ;;/¡§Htemperature switch display (4)Maximum/minimum temperature and humidity memory function (5)12/24 hour clock (6)The whole point timekeeping function (7)Daily alarm function (8)Calendar display (9)Dimensions:106*98*22mm (10)Battery:1.5V(AAA)*1 (11)Packing:100 sets/box,50sets/carton This indoor digital hygro-thermometer measure temperature and relative humidity. It also has a comfort level Indicator. Measure in Celsius from -50 degree to 70 degree or in Fahrenheit from -58 degree to 158 degree F. Sampling period: 10 seconds. Requires one AAA battery (included). temperature range: -50 degree to 70 degree/-58 degree to 158 degree F - battery: AAA, 1.5V (included). temperature accuracy: +/- 1 degree C (2 degree F) - dimensions: 4.13-Inch H x 3.94-Inch W x 0.91-Inch D. Indoor relative humidity and comfort level Indicator. Clock display with alarm function. (11)Packing:100 sets/box,50sets/carton