White plastic is the high quality plastic, mercury thermometer, glass as the main materials of the products, this product is made of white plastic, glass, and mercury is square card among the calibration precision thermometer, test range of 40-50 degrees Celsius and 40-120 - humidity, it can be hung on the wall the best amount of room temperature and humidity, and can adjust its suitable for the baby's room, greenhouse, the pure and other places to use