ZWO Desiccant Tablets for Cooled Cameras (ZWO-DESICC)
It includes 4 pieces of desiccant tablets.
Four small desiccant tablets are used inside the sensor chamber to keep the sensor from forming dew or frost. These pellets should be replaced at the first sign of moisture on the inside of your sensor. A packet of tablets comes standard with all ZWO cooled cameras, but when you run low, you can load up on them by purchasing this packet.