Specifications:Features:- Humidifier is designed for protecting your guitar in the driest conditions.- For Acoustic Guitars.- Releases moisture evenly and slowly inside your guitar to maintain the proper humidity level.- The humidifier suspends between the strings and never touches any part of the guitar's body.- Fill in the distillded water into the nozzle about once a month for maintaining the humidifier.- The frequency depends on the specific atomospheric conditions.- Distilled water should be used, no tap water.Color: Black, White, CoffeeMeterial: PlasticSize: 89 x 83 x 32 MMStyle: Elliptic TypePackage Weight : 30 G / 1.06 OuncesPackage Dimensions (L*W*H) : 87*60*32 MM / 3.43*2.36*1.26 InchesRetail Packaging: No, No PackingPackage Include:1 x Guitar Humidifier1 x Manual