Since 1906, Sloan Valve has been the world's leading manufacturer of water-efficient solutions that are built to perform, guaranteed to last, and are designed with the hopes of promoting a healthy environment through water conservation. PERMEX Synthetic Rubber Diaphragm with Dual Filtered Fixed Bypass. Flex Tube Diaphragm designed for improved life and reduced maintenance. ADA Compliant OPTIMA Plus Battery Powered Infrared Sensor for automatic No Hands operation. Infrared Sensor with Multiple-focused, Lobular Sensing Fields for high and low target detection. Latching Solenoid Operator. Engineered Metal Cover with replaceable Lens Window. Courtesy Flush Override Button. Four (4) Size AA alkaline Batteries included: Duracell with DURALOCK Power Preserve Technology-guaranteed for up to 10 years in storage. Low Battery Flashing LED. Infrared Sensor Range Adjustment Screw. Four AA batteries included. ⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects and/or other reproductive harm. For more information go to www. p65warnings. ca. gov.