Easy to use - just install, program, and you're done! Proactive display notified users when to change the refill and batteries. Sleek, compact high-performance aerosol systems with flexible programming options. Virtually maintenance free, reducing the potential for workplace mishaps or accidents. Proactive days-to-refill display, scent replacement indicator, and optional audio tone. Flexible dispenser programming allows for the refills to last up to 168 days or 3,000 sprays.