Features: 1. Record the temperature at a specific time: The highest-minimum thermometer is used to record the highest temperature and minimum temperature of air at a certain time. 2. Principle: The temperature around the tube in a blue indicating needle of a wool stoma, blue as the temperature changes the index up, and when the temperature drops, the blue pointer not affected by the temperature drop and changes, which indicates the maximum or minimum temperature. 3. Workmanship: Fine workmanship and good performance. Convenient to use. Description: It is used to record the highest and lowest temperature in the air in a certain period of time. Based on this, it can scientifically guide you to maintain fruits, vegetables, seedlings, flowers and various plants. How To Use: 1.The thermometer should be suspended in the air. 2.Observe the time of temperature, and make a decision. Record the temperature indicated at the lower end of the indicator when observing, and press the button to attract the needle and the column at both ends. Specifications: Material: Plastic + Acrylic Color: White Package Size:: 233*78*25mm Temperature Range: - 40 ~ +50 Suitable environment for human body: 15 ~ 25 Relative humidity: 45%RH~75%RH Room environment: 40%RH~70%RH Library Art Museum: 45%RH~60%RH Storage of clothing, cotton and wool textiles: 40%RH~60%RH Storage of dairy products: 50%RH~60% RH Package Information: Package Weight: 200g/7oz General Box Package Package Included:1 * Max-Min Thermometer Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.