Dispensers are guaranteed against normal wear and tear, subject to correct installation, usage and dispenser care. Delivers the exact amount required, controlling usage and reducing waste. The ultrasonically sealed cartridge and pump mechanisms prevent the ingress of air into the cartridge during use to help prevent product contamination and ensure fresh product is dispensed every time. ADA compliant: extends less than 4" from the wall as required for all ingress and egress locations. Uses the latest infra-red sensing technology for reliable operation to prevent misfiring; tolerant to skin color, temperature, ambient light and humidity.