What’s Great about MHI-505? No wires – simply plug, recharge overnight and use Rechargeable – no batteries require in operation. 100% renewable – no messy spills or refills. After each recharge, usable for 1-2 months in a enclosed space (subject to amount of moisture in the air). Easy to read indicator; blue for ready-to-use, and pink for recharging. Applications It helps to remove excess moisture and bad odor from closets, cabinets and other confined spaces. It contains high molecular absorbing granules, a very thirsty substance and has an absorption rate much higher than traditional, soluble humidity adsorbing products. Ideal for use in wardrobes, shoe cabinets, bookshelves, drawers, store room, and in any area that is damp. Also great for caravans, motorhomes and boats. How it Works! >> Before using your Rechargeable Dehumidifier for the first time, please charge the unit for around 10 hours, or until the crystals viewed through the viewing wondow are blue. << 1. When the indicator window is blue, place the unit in a suitable location. 2. The unit will absorb moisture from the surrounding area, and will increase weight. 3. When the unit is full, the indicator window turns pink. 4. Plug in the unit and recharge overnight or until the indicator window returns to blue. 5. The unit is now ready for use once again.