The whole rectangular body with rounded corners is matched with cuddly bear elements, with a pair of round ears with dot texture at the top and relief-shaped small hands and feet on the front to create a cute bear image. The whole machine has a large rounded corner transition without sharp edges and corners to avoid bumps and scratches. The body is small and compact, which is in line with the adult's one-handed holding size. The side is reserved with lanyard holes and matched with the same color braided lanyard, which is convenient for hanging, storage and carrying out, and effectively prevents loss. The relief hand and foot not only enriches the modeling level, but also can be used as tactile contact for children to grasp and play, so as to relieve the tension of temperature measurement.