This is a small dehumidifier. The color-changing silica gel on the transparent shell can be viewed and judged at any time. When the color-changing silica gel absorbs water and is saturated, the color-changing silica gel can be heated and dried through the jack at the bottom for repeated use. When the water absorption efficiency of the color-changing silicone is reduced due to multiple cycles, the top cover can be opened to replace the color-changing silicone.