Ready to use formula kills bedbugs and lice on contact. Long lasting, water-based, non-staining, and odorless. Ideal for use on a variety of surfaces including mattresses, box springs, drapes, clothes, walls, floors, and carpets. Effective results begin after the spray dries. Residual spray kills bedbugs when they return to the treated area. Leaves no visible residue. EPA (Environmental Protection Agency) registered. Active ingredient: Deltamethrin.