1 reusable moisture collection unit. Drop-in tablet. Our fastest acting. Moisture absorber with drop-in tab. Attracts & traps excess moisture. Eliminates musty odors. When you have musty odors from excess moisture, you need a fast solution. DampRid Reusable Drop-In Moisture Absorber is our fastest acting moisture absorber. It's designed to go to work immediately, attracting and trapping excess moisture, eliminating musty odors and creating fresher, cleaner air. Lasts 30 to 60 days (This product works most efficiently in closed areas. The effectiveness of the product will be compromised in well-ventilated spaces)(Duration will vary based on temperature and humidity). Refill packs available. (A) Drop-in moisture absorber tab. (B) Spout to empty collected liquid. (C) 360 degrees ventilation system. (D) Moisture collection.