Regal Optima SMO Exposed Battery Powered Side-Mount Sensor Operated Flushometers Quiet, Exposed, Diaphragm Type, Chrome Plated Flushometer for either left or right hand supply with the following features: PERMEX Synthetic Rubber Diaphragm with Protected Fixed Metering Bypass Orifice ADA Compliant OPTIMA ® Battery Powered Infrared Sensor for automatic “No Hands operation Chrome Plated Infrared Sensor Housing Angled Sensor Window Manual Override Flush Button Four (4) Size C Batteries included “Low Battery Flashing LED with Optional Audio Tone “User in View Flashing LED Optional 24 Hour Sentinel Flush Infrared Sensor Range Adjustment Screw and Reset Button Locking Vandal Resistant Stop Cap Adjustable Tailpiece Vacuum Breaker Flush Connection Sweat Kit with Cast Set Screw Wall Flange High Copper, Low Zinc Brass Castings for Dezincification Resistance Low Consumption Flush Accuracy Controlled by Para-Flo Technology No External Volume Adjustment to Ensure Water Conservation Diaphragm, Stop Seat and Vacuum Breaker molded from PERMEX Rubber Compound for Chloramine Resistance