Features: Easy installation. Waterproof, weatherproof, durable in use. High accuracy, large LCD display, easy to read. Come with / change display, frost-point alarm, convenient to use. Multifunctional, can be used to detect temperature and humidity for indoor, home, mall. Specifications: Material: ABS, Electronic Component Temperature Measuring Range: Indoor: -10 to 50(14 to 122) Outdoor: -50 to 70(-58 to 158) Humidity Measuring Range: 20%RH to 90%RH Battery: 1x1.5V(AG13) (NOT Included) Function: / Change Display, Indoor Outdoor Temperature Display, Indoor Humidity Display, Maximum-Minimum Temperature Humidity Memory, Frost-Point Alarm[-1 to 4(30.2 to 39.2)] Size: Approx. 7x2x8cm/2.76x0.79x3.15in Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Temperature Humidity Detector