Features: With humidity and temperature sensor, sensitive and convenient. LCD screen display, easy to read clearly. High precision and low power consumption. Maximum and minimum value measurement mode Data retention function, showing temperature and humidity at the same time. Dual digital LCD display with backlight. Automatic shutdown function and disable automatic shutdown function. Compact in size, light in weight, easy to carry and handle. Specifications: Humidity / temperature measurement range: Dew point temperature: (-20 ~ 80 ℃ / - 4 ~176 ℉) Wet bulb temperature: (0 ~ 80 ℃ / 32 ~ 176 ℉) Resolution: 0.01% RH, 0.01 ℃ / ℉ Humidity accuracy: ±3%RH（25℃, 20%~80%RH), ±2.5%RH (other) Temperature accuracy: ±0.5℃±0.9℉ (about 25 ℃), ±0.8℃±1.5℉ (other) Fast response time: 10 s (90% 25 ℃) Operating environment: 0 ~ 40 ℃ (32 ~ 104 ℉); < 80%RH non-condensing Storage conditions: - 10 ~ 60 ℃ (14 ~ 140 ℉); < 80%RH non-condensing Battery: 1 * 6F22 9V (Not included) Size: 18.5 x 5.5cm / 7.28 x 2.17in Weight: 130g Package included: 1 x Temperature Humidity Meter (Not included) 1 x Manual 1、With humidity and temperature sensor, sensitive and convenient. 2、LCD screen display, easy to read clearly. 3、High precision and low power consumption. 4、Maximum and minimum value measurement mode 5、Data retention function, showing temperature and humidity at the same time.