Features: Help to absorb any moisture which may build up on or in a hearing aid or IEM (in ear monitor) Use with the Drying Cup: Place capsule in drying cup, then place the hearing instrument in the insert and the insert into the drying cup (the use of the insert means the hearing instrument doesn't touch the drying capsule). Put the lid on the cup and leave to dry, ideally overnight. To be used every day - a capsule should last about 2 weeks Can be used until the yellow indicator turns white Specification: Condition: 100% New Item Type:Hearing Aid Drying Material: Plastic Size: 3cm Package List: 4Pcs/box * Hearing Aid Drying Note Please be reminded that due lighting effects, monitor's brightness/contrast settings Etc, there could be some slight differences in the colour tone of the website's photo and the actual item. Item Measure by hand, it could be 3cm different,your kind understanding will be much appreciated