For safe, effective and economical control of insects. Portable, battery operated dispenser features on/off switch and modern design. Adjustable automatic dispensing for 24 hour control of flies. Insecticide refill contains pyrethrins and piperonyl butoxide. Fragrance refills chemically attack and destroy molecules of odor. Refills are 6.5 oz and last approximately 30 days. Refills will not fit Cline-Buckner dispenser.