Optima SMO Battery Powered RetroFit Units for Existing Flushometers Quiet, Exposed, OPTIMA ®, Battery Powered, Sensor Operated Flushometer Retrofit Conversion Kit for Sloan Flushometers with the following features: 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 Installation Tools provided No External Volume Adjustment to Ensure Water Conservation