1. large HD screen with wide viewing angle 2. background color zoning for accurate readings 3. the comfort prompt 4. color alarm messages for boundary crossing 5. temperature and humidity trend arrows Close to cold and hot: temperature 16 to 25C comfortable, temperature 16C cold, temperature 25C warm; 40-70% comfortable humidity, 40% dry humidity, 70% humidity humidity. Limit-exceeding alarm simulation display: temperature and humidity limit exceeding alarm, the backlight of the upper limit is orange, the backlight of the lower limit is red. Silent running time, two sets of alarms: alarm duration: 2 minutes, duration of the repetition: 5 minutes Alarm 1, gradual alarm to wake you from sleep; Alarm 2 can be set to prevent Alarm 1 from going off, additional protection against reminders. Two power options: 3 AAA batteries (not included) / DC 5V power cable Product size: 12.5*2*12.5cm We only sell the thermohygrometer, not other items in the picture. Due to the difference between the monitors, the picture may not reflect the actual color of the item. Please allow slight error in size due to manual measurement.