Large dual LCD display shows ambient temperature and relative humidity simultaneously. This compact thermo-hygrometer measures temperature and humidity and features Data Hold and Min/Max functions. The LM-81HT is easy-to-use and comes with a wrist strap for one handed field operation. • Compact and lightweight. • Dual LCD display. • User selectable Fahrenheit/Celsius. • Data Hold and Min/Max function. • Low battery indicator and auto shut-off. • 6.1 H x 2.4 W x 1.3 D. • Blue. • Humidity range of 10 to 95% RH. • Humidity resolution of 0.1% RH. • Humidity accuracy of + or -5% RH. • Temperature range of 32 to 122 degrees Fahrenheit (0 to 50 degrees Celsius). • Temperature resolution of 0.1 degrees Fahrenheit/degrees Celsius. • Temperature accuracy of + or -2.5 degrees Fahrenheit (+ or -1.2 degrees Celsius). • Powered by a single 9V battery (included). • Weighs 5.6 oz. (160gram). • Sold as 1 Each.