[Touch screen and / switch] Touch control used to control the temperature unit. Press " / History" once to change the temperature unit. Press the "Light" button once to turn on the light. It will automatically turn off within 10 seconds without you having to perform any action. With backlight on, press once to turn off the light. [View/Clear temperature data] Long press "/ History" to view temperature and humidity for past 24 hours or the last 24 hours. Press and hold "MAX/MIN CLEAR" (max/min clear) for 3s-5s to clear the maximum and minimum records. It is very useful to understand the daily climate or climate change in four seasons, and can be used to predict the tendency to take care of your health. [Battery type and low battery warning] Station: 2 * 1.5V AAA batteries; Sensor: 2 * 1.5V AAA batteries (batteries not included). After the remote sensor or measuring station is turned off, a charging icon will appear to remind you that you need to replace the battery. [Multiple Placement Methods] Digital temperature and temperature monitor humidity sensor, with choice of workbench, wall and magnetic mounting parts. The sensor can be suspended or placed horizontally. With an IPX-4 waterproof sensor, it is very suitable for outdoor and indoor use, such as B. Used in offices, hotels, greenhouses, hatching rooms, pantries, schools, laboratories, baby rooms, etc. Product features: large touch screen Turn on the screen (automatically turns off after 10 seconds) conversion s C / F optional Maximum and minimum temperature Humidity storage function Display temperature and humidity history humidity 3 installation methods - desktop (placement), lifting hole (wall), magnet back (adsorption) Update the temperature and humidity all the 10 seconds to accurately reflect the temperature Product parameters: Indoor temperature range: -4F-158F (-20C-70C) Outdoor temperature range: -40F-158F (-40C-70C) Humidity range: 20%-95% Comfort display: dry, comfortable, wet Temperature display unit: C / F optional (standard is C) Resolution of temperature: 0.1C/ Humidity Resolution: 1% Update rate: every 10 seconds Temperature error: 1 Humidity error: 5% Power supply: AAA batteries (not included) Note: 1. Do not expose the device to extremely high or low temperatures, otherwise electronic components and plastics may be damaged. 2. Please replace the battery when the LCD screen stops working. 3. Do not immerse the product in water. Package contains: 1 x Thermohygrometer 1 x User Manual Shop Tips: 1. The size is manually measured, please allow the error (1-3cm). 2. Due to different monitor pixels, there may be color difference, please refer to the actual product.