Features Humidifier is designed for protecting your guitar in the driest conditionsIdeal for Acoustic GuitarsReleases moisture evenly and slowly inside your guitar to maintain the proper humidity levelThe humidifier suspends between the strings and never touches any part of the guitars bodyFill in the distillded water into the nozzle about once a month for maintaining the humidifierThe frequency depends on the specific atomospheric conditionsDistilled water should be used no tap water Specifications Color Black White Gray BrownMeterial Plastic lucoolProduct size L x W x H 8 0 x 8 5 x 3 3 cm Package Included 1 x Guitar Humidifier1 x Users Manual