This professional meter can measure and humidity with reliable measurement results. Dual display of and humidity easy to exchange between ℃ and ℉. It is suitable to be used in laboratory warehouse restaurant greenhouse air-conditioned rooms etc. Features: Data hold with Maximum and Minimum. Display the measured value at the large LCD display screen. LCD display with switchable backlight easy for reading and convenient to use at night. Display the and humidity at the same time easy to exchange between ℃ and ℉. Additional Functions: data storage automatic shutdown low battery indication and overload indication high and low humidity alarm function. Compact Size and Weight: you can hold and carry it conveniently. Humidity and meter is widely used in science and industry. Application included used in warehouse home office school business air conditioning system quality control system and laboratory etc. Specifications: Brand name: Smart Sensor Color: Black Material: ABS Display: LCD Display measuring : -10°C-50°C14°F-122°F resolution: 0.1°C0.1°F Accuracy: +/-1.5°C Humidity measuring : 5.0%RH-98%RH (Humidity Sensor can’t dip in water) Humidity Resolution: 0.1%RH Humidity accuracy:(assume the environment is 25+/-3°C) (5.0%RH-40%)+/-5%RH (41%RH-80%)+/-4%RH 81%RH-98%)+/-5%RH Refresh Rate: 2timessecond Operation environment: 0°C-50°C≤80%RH(not condensing) Storage environment: -10°C-60°C:0%-90%RH Power Supply: 3 * 1.5V AAA Batteries(Not Included) Model number: ST9617 Item weight: 78g0.17lb Item size: 15 * 5 * 2.3cm5.9*1.97*0.9in Package weight: 119g0.26lb Package size: 19.5 * 7.5 * 3.57.68*2.95*1.38in NOTE: Please don t store it at high or humidity high concentration salt or sulfur environment. If don t use it for a long time please take off the battery to leakage of battery. Please allow 1-3cm differences due to manual measurement. Package list: 1 * and Humidity Meter 1 * User Manual(English)