Mini humidity & temperature meter designed with fashion, small and portable appearance, can be widely used for laboratory, industrial, engineering test and other applications.   Features: Measure temperature & humidity, wet bulb and dew point temperature.  Digital humidity and temperature meter used for a high range of applications, such as industry, agriculture, meteorology, medical, daily life, building engineer, in wine cellar, machine room and data storeroom.  MAX / MIN / Data Hold functions, high accuracy & fast response.  LCD display with backlight for easy operation in darkness.  Low battery indication, auto power off, energy saving.   Specifications: Material: ABS;  Temperature Range: -20~70℃ / -4~158℉;  Temperature Accuracy: ±1℃ (5~50℃ / 41~122℉);  Humidity Range: 0~100%RH;  Humidity Accuracy: ±4%RH (25℃/77℉, 10~90%RH), full range accuracy is ±5%RH;  Dew Point & Wet Bulb Range: -20~50℃;  Dew Point & Wet Bulb Accuracy: ±2℃ (5~50℃ / 41~122℉, 10~90%RH);  Max. Response Time: 30s;  Operating Current: Approx. 13mA (without backlight), approx. 17mA (with backlight);  Power Supply: 3 * 1.5V AAA battery (NOT included);  Item Size: 181 * 56 * 33mm / 7.13 * 2.20 * 1.30in;  Item Weight: 106g / 3.76oz;  Package Weight: 184g / 6.49oz;  Package Size: 22.5 * 8 * 4.5cm / 8.86 * 3.15 * 1.77in;   Package List: 1 * Digital Thermo-Hygrometer;  1 * User Manual Manual