This Silent Dry Shotgun Jr. moisture absorber protects guns, accessories, ammunition and more against moisture damage. One single dehumidifying stone can be used in confined spaces, like rifle cases, with a volume of up to 40 litres. It is possible to dehumidify larger spaces as well by using more stones simultaneously. The innovative dehumidifier by Silent Dry remains effective for about 30 days, after which it should be dried using a microwave. Thanks to the humidity indicator, it is clear when the dehumidifying stone is filled up with moist and needs to be dried. The colour on the indicator will have changed from white (dry) to blue (wet). Drying the stone is easy. Firstly, remove the protective case and the humidity indicator from the stone. Then, simply put the stone in the microwave for a maximum of 11 minutes on 200 to 300 watt. After this, the stone is dried and effective for approximately another 30 days. It is also recommended to dry the stone before the first use, because it could already have absorbed moisture during transport. Silent Dry Shotgun Jr. moisture absorber features: With protective case Humidity indicator Sturdy Odour-free Reusable 1 stone for spaces up to 40 litres Multiple uses