While the box says these drying capsules are for the Phonak C&C drier, they also fit in the Phonak Charger Case RIC. The box comes with six capsules. My Phonak hearing aid instructions say to replace the capsule every month, while the instructions inside the box say to replace the capsule when the crystals change from yellow to white.

https://www.amazon.com/Phonak-Hearing-Aid-Drying-Capsules/dp/B00DZW2EI6