Digital Innovations Device Dryer Dehumidifier for Portable Devices (4100200) Effectively dries out smart phones, MP3 players, digital cameras, GPS systems, watches and more Easy to usesimply remove any batteries, SIM card or memory card from the wet device, drop it in the bag and close the seal Moisture absorbing beads change color to indicate they are working Reusable Effectively dries out wet smartphones, MP3 players, digital cameras, GPS systems, watches and more Moisture absorbing beads turn from yellow to green to indicate they are working Simply remove the batteries, SIM card/memory card from the wet device, drop it in the bag and close the seal