Handle Packing, Main Seat, Stop Seat and Vacuum Breaker Molded from PERMEX Rubber Compound for Chloramine resistance;PERMEX Synthetic Rubber Diaphragm with Dual Filtered Fixed Bypass;User friendly three (3) second Flush Delay;Fixed Metering Bypass and No External Volume Adjustment to Ensure Water Conservation;OPTIMA EL-1500 Self-Adaptive Infrared Sensor with Indicator Light;“Walk By” Delay of Eight (8) Seconds Prevents Unintentional Flushes;13 1⁄2” x 13 1⁄2” Wall Box with Stainless Steel Access Panel and Vandal Resistant Screws;Vacuum Breaker Flush Connection with One-Piece Bottom Hex Coupling Nut, Spud Coupling and Flange for 3⁄4” Rear Spud;Wall Box with Stainless Steel Access Panel and Vandal Resistant Screws;3/4” I.P.S. Wheel Handle Bak-Chek Angle Stop