13 OZ, Citrus Melody, Odor Absorbing Gel, Long Lasting Scent Is Great For Areas Where Strong Odors Linger, Simply Unscrew Lid & Remove Seal To Expose Vents, Place Near Vent Or Fan For Improved Odor Absorption, Effective For Rooms Up To 450QFT, Replace After Approximately 60 Days, For Stubborn Odors, Remove Lid Completely, Use For Pet, Smoke, & Cooking Odors.