Humidifier designed for all ukulele types. It is ideal for use in areas with dry air. It can be placed in the soundhole of the ukulele or in the instrument case. Prevents drying of wood, it contains a removable sponge that can absorb water up to 10 times the volume of its weight, without dripping. Humitar releases moisture gradually and evenly. The moist lasts long time, it does not require frequent checking and sponge is replaceable. We recommend to refill the sponge with destilled water.