HABOTEST 4-in-1 Digital Psychrometer Portable Thermo-Hygrometer Mini Temperature and Humidity Meter Pen with Dew Point and Wet Bulb Temperature (Batte

Features:4-IN-1 METER: Accurately measure temperature, humidity, wet bulb and dew point.HANDY METER: Weighing only 1.62 ounces, measuring 7 by 1.2 by 1.2 inches, compact and lightweight, easy to carry around.PRACTICAL FUNCTIONS: Displays Celsius, Fahrenheit, Max. value, and Min. value.EASY TO READ: Green backlight ensures clear visibility even in the dim light.EASY TO USE: Without complicated instructions, extremely simple to use.AUTO POWER OFF: Auto power off after about 30 minutes if there is no operations, save the power.BATTERY POWERED: Powered by 2 pieces 1.5V AAA batteries.APPLICATION: Can be used in home, apartment, greenhouse, aquaculture, terrarium, etc.Note:*Please refer to the user manual carefully before use.*Batteries not included.Parameters:Ambient Temperature Range: -20~60 (-4H~140H)Ambient Temperature Accuracy: 0~451 (other: 1.5)Humidity Range: 0.0%~99.9%RHHumidity Accuracy: 20%~80%3.0%RH (other: 4.0%RH)Wet Bulb Temperature Range: -20~60 (-4H~140H)Wet Bulb Temperature Accuracy: 0~451 (other: 1.5)Dew Point Temperature Range: -50~60(-58H~140H)Dew Point Temperature Accuracy: 0~451 (other: 1.5).