Earmuffs have 3 major effects: 1. Protect the ear. The head of the earmuff is made of soft plastic and has elasticity to protect the child's soft eardrum. 2. Protect the probe, the ear will be attached to the earmuff, not the probe, so when you wipe, less contact with the probe, prolong the service life of the ear thermometer. 3. Safety, different people use different earmuffs to reduce cross infection. But the substitution suggests that changing earmuffs and toothbrush is a matter of personal hygiene. It is recommended to buy 1-2 more boxes because the earmuffs have no shelflife. Delivery Quantity: 4set (80pcs) Package Contents: Only the above package content, other products are not included. Size: Packing: 2.9*2.7*7.6 cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color: White (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)