Feature:1. Main Application: This humidifier can solve the problem of cracking, wrinkling and sinking of the guitar panel caused by drying.2. Scope of Application: This humidifier is suitable for defending the guitar, ukulele. You shall take it for the protection of your instrument!3. Easy Using: There is a triangle outline hole on this humidifier. Add water in it and it will release water evenly and slowly inside the guitar.4. Dual Use: This guitar humidifier can also be used as a guitar dehumidifier, use the accompanying desiccant to absorb moisture around the guitar.5. Compact Size: Comes with a small and compact size, this guitar humidifier is easy to carry around to help with your work!Specification:Item Type: Guitar HumidifierMaterial: PlasticColor: BlackProduct Battery Parameters: Lithium battery x 1 603030 600 mA (shipped with built in battery).Package List:1 x Guitar Humidifier 1 x Manual3 x Water Binding Agents2 x Fixed Stand 1 x Auxiliary