By allowing more sound to enter your ear canal by removing the blockage of dirt, dust, and earwax, it becomes less obstructed. They are lubricated with silicone lubricant. Both are very efficient. The small one is compact and fills quicker, while the large one irrigates longer. 8 year olds can use it.
Parents can help if needed.
It was especially designed for children. It has been doctor tested and approved. A pulse action of irrigation is needed on 3 year olds. Squeeze the rubber bulb half way each time with your thumb. Use warm water.