PERMEX Synthetic Rubber Diaphragm with Dual Filtered Fixed Bypass;Sweat Solder Adapter with Cover Tube and Cast Wall Flange;1” I.P.S. Screwdriver Bak-Chek Angle Stop with Vandal Resistant Stop Cap;Spud Coupling and Spud Flange for 1 1/2” Top Spud;“Low Battery” Flashing LED;No External Volume Adjustment to Ensure Water Conservation Economical;Stop Seat and Vacuum Breaker Molded from PERMEX Rubber Compound for Chloramine resistance;Infrared Sensor with Multiple-focused, Lobular Sensing Fields for high and low target detection;Engineered Plastic Cover with replaceable Lens Window;Courtesy Flush Override Button;Four (4) Size AA Batteries included