Function: 1. It can prevent earwax or water from remaining inside, thereby prolonging the life of the hearing aid. 2. Made from high-quality plastic, it ensures long-lasting durability. 3. Easy to install, so older or other groups can use it comfortably. 4. It is waterproof and oil resistant, wear-resistant and durable, not easy to damage. 5. Suitable for Phonak and Resound hearing aids, it is a practical accessory for hearing aids. Specification: Item Type: Hearing Aid Cover Material: plastic; Hole diameter: Ok. 1.2mm/0.05in Suitable for hearing aid: fits Phonak, fits ReSound Instructions: Use the mesh remover to remove the old earwax protection filter, clean the doorbell outlet, use the other end of the mesh remover to tighten the earwax protection filter, install it in the doorbell mouth, gently check if it is hard or not loose List of packages: 1 box hearing aid cover (8 pieces) Note: 1. With a small brush, clean the filter to protect against earwax. 2. Replace the anti-wax filter once every six months to a year, depending on the condition of the earwax. 3. After installing the anti-wax filter, it should be firmly put on to avoid falling into the ear canal.