Dual Dispensing Methods ? Touchless soap dispenser can be manually activated when batteries are depleted for continuous operation Universal Compatibility ? Dispenses bulk foaming hand soaps and sanitizers from any brand freeing you to choose the soap that fits your needs and budget Adjustable Portioning ? Dispenser can be adjusted to dispense .5 mL or 1 mL per pump reducing soap waste Long Battery Life ? Dispenses up to 80,000 times off 4 C batteries Multi-Surface Mounting ? Adheres to tile and metal walls with double-sided tape (not included) or drywall, brick or masonry with 3 screws (not included)