At-A-Glance™ refills provide the easiest way to see when refills need to be changed. Dispenser and formulation are calibrated to provide the optimal dose for effective hand hygiene. Includes 4 "C" cell batteries, no tools required for replacing batteries. Sanitary Sealed™ PET refill bottle with removable collar for easy recycling. Lock or Not™ technology, can convert to a locking system. Fully ADA compliant. Guaranteed reliability.