General description The Unibond Optimum Moisture Absorbing System effectively prevents condensation, dampness, unpleasant odors, and the growth of mould and dust mites, which can trigger allergies. It is ideal for use in every room of the home as well as in caravans and boats. This system operates silently and does not require electricity. Technical specifications Pack contains 2 x 450g Refill Tabs Effective in rooms up to 20m² Refills last approximately 3 months in a 20m² room