1Lightweight and portable, stable performance, temperature and humidity can be measured. 2Builtin Bluetooth, which can be connected to mobile phones and controlled by APP. 3Support dew point temperature measurement, wet bulb temperature measurement, high accuracy, low power consumption. 4The LCD screen with backlight allows data to be read even in a dark environment. 5Suitable for factories, laboratories, warehouse management, food hygiene, air conditioning systems, etc. Item Type: Temperature Humidity Meter Material: ABS Ambient Temperature Range: -20~70 (-4 ~ 158) Ambient Temperature Accuracy: 1 Humidity Range: 0%~100% RH Humidity: Accuracy 4% RH Dew Point Range: -20~50 Dew Point: Accuracy 2 Wet Bulb Range: -20~50 Accuracy of Wet Bulb: 2 Power Supply: 3 x 1.5V AAA Battery (Battery Not Included) Working Current: 13mA, 17mA (Backlight) Response Time: 30S Bluetooth Communication (Application): Support Record 999 Sets of Data: Support / Selection: Support Data Retention Display: Support Maximum/Minimum: Support Automatic Shutdown: Support Alarm Setting: Support Automatic Shutdown: Support 1 x Temperature Humidity Meter (Battery Not Included) 1 x Instruction