Automatic, setandforget humidifier that maintains the 45% to 50% relative humidity inside your instrument case to help prevent warping, cracks, and other damage caused by low humidity. Key benefits Automatic adjustments: Adapts to seasonal changes, location, temperature, and other factors without manual input, unlike refillable humidifiers. Stable target humidity: Maintains a constant 45% to 50% relative humidity inside the case, removing the need for frequent checks or refilling and avoiding the mess of liquid refills. Twoway humidity control: Uses twoway control to stabilize humidity within the case for more consistent protection. Instrument protection: Reduces the risk of warping, cracking, and joint separation associated with insufficient humidity. Easy to use: Place inside the instrument case and let it operate automatically; no regular maintenance or calibration required. Function and compatibility Designed for use inside instrument cases, including guitar cases. Compact form factor fits within typical case interiors without interfering with the instrument. Performance focused on maintaining the specified 45% to 50% relative humidity range for reliable, continual protection. Typical use scenarios Home storage during winter when indoor heating dries the air: keeps case humidity stable without daily monitoring. Travel and transport between climates: maintains consistent humidity while the instrument is in its case. Longterm storage between playing sessions or during seasonal breaks: preserves the instrument and reduces humidityrelated deterioration. What it solves Eliminates the guesswork of when and how much to humidify. Removes the need for regular refilling and the risk of spills inside your case. Provides continuous humidity control to protect wooden instruments from moisturerelated damage. This automatic case humidifier is intended for incase use to maintain 45% to 50% relative humidity and protect instruments from damage caused by low humidity.