Feature : 1. Hearing aid drying cake improves sound quality and lifetime, and protects your hearing aid. 2 . It can absorb the harmful daily moisture of the hearing aids and extend the life span. Can be used with simple dryers and new dryers. 3 . Suitable for any hearing aid that can be used through the drying tank, and can be reused until the golden yellow color turns white. 4. This product is yellow glue, environmental protection material, centralized packaging, high drying efficiency. 5. Solves the problem of dust getting easily dirty and getting inside the hearing aid when using a traditional dehumidifier. Specification : Item Type: Hearing Aid Drying Cake Material: silicone; Scope of application: Suitable for any hearing aid to be used through drying tank Package List : 4 x dry dough