【LED Backlight】One-touch backlight, gentle eye protection. The backlight is bright at night so you can quickly access the time. During the day, the backlight lights up with a soft brightness. 【Screen Display】The screen displays time, alarm clock, indoor and outdoor temperature, temperature trend, calendar, frost alarm. Excitement indicates a healthy excitation cortex. The time display can be switched between 12 hours and 24 hours. 【For outdoor testing, travel testing】Check the indoor temperature of your home every day and live a healthy life. Indoor and outdoor detection, safe driving. Office test helps create a comfortable office environment. Change the temperature unit, you can switch °F and °C. The large LCD screen displays clear and accurate data. -1°C to 4°C frost alarm function 【Comfortable display】The voltmeter display stand with digital thermometer can be adjusted 180 degrees at a glance. Large LCD screen, easy to read and clear visual experience. Note: The data are all