Used for about a month. The screen has some scratches. ◆ For seasonal influenza and heatstroke prevention. ◆ Displays the danger level of hot environments in 4 stages. Displays the danger level of influenza outbreaks in 2 stages. ◆ Dryness Index Mode (for preventing seasonal influenza): Automatic lower limit alarm for dryness index (alarm setting can be changed). ◆ Heatstroke Index Mode (for preventing heatstroke): Automatic upper limit alarm for heatstroke index (alarm setting can be changed). ◆ Auto Mode: Automatically switches between Heatstroke Index Mode and Dryness Index Mode. ※ This product is not a product that can completely prevent heatstroke. The onset of heatstroke is affected by various factors such as the thermal environment (temperature, humidity, radiant heat), individual differences (gender, age, medical history, and health condition), activities (exercise, work, daily life activities), and so on. When using this product, please understand its characteristics and use it as a guideline only. If you feel unwell while using this product, regardless of the display on this product, move to a cool place or seek medical attention.