Feature: 1. Protection Function: The humidifier pack is mainly used to protect musical instruments from warping, cracks, and other damage caused by a lack of humidity.2. Two Way Humidity Control: This humidifier pack provides two way humidity control, and can maintain a relative humidity level of 45‑50% inside the instrument casing. 3. Automatic Regulation: Automatically maintain the optimal humidity inside the instrument casing, no manual adjustment required based on season, location, or temperature. 4. Applicable Instruments: These humidifier packs are suitable for acoustic guitar, classical guitar, electric guitar, bass, violin, cello, banjo, mandolin, ukulele, and more. 5. Convenient Use: These humidifier packs are compact and lightweight, can be placed inside the instrument casing or at the sound hole, convenient and practical. Specification: Item Type: Guitar Humidifier Packs Package List: 3 x Guitar Humidifier Packs1 x English User Manual 2 x Cloth Bags or 3 x Guitar Humidifier Packs1 x English User Manual |