specification: _x000D_Item Type: Hearing Aid Filter_x000D_Material: Plastic _x000D_Function: Prevent foreign matter such as earwax and dust from blocking the horn_x000D_Usage: _x000D_Take out the old filter with screen changer_x000D_Clean the horn_x000D_Take out one of the filter _x000D_Use the other end of the screen changer to catch the filter _x000D_Into the horn mouth_x000D_Gently test your hand to see if it is firm or not_x000D_Note: If there is screen changer or it has been lost, you can install it by hand. Be careful to avoid falling._x000D_Note: _x000D_1. Frequently clean filter with a small brush_x000D_2. Replace filter once every six months to a year according to the earwax_x000D_3. Make sure that the installation is firm to avoid falling into the ear canal Features: 1Waterproof and oil?proof filter prevents earwax, dust and other foreign matter from clogging the horn. 2Effective extending the service life of the listening device, keep the good and normal condition of the hearing aids horn. 3Hearing aid earwax filter, mainly used for ensuring the cleaning state of your hearing aids horn. 4Compact size, easy and convenient to install into your hearing aids, wonderful accessory. 5Made of quality plastic materials to ensure durability for long periods of use. PackageList: 1 x Hearing Aid Filter Cover