Electronic Flush Valve for W.C. activated by an infrared sensor. Includes a mechanical override push button for alternative manual operation. Powered by an internally mounted 9V battery. Shut-off valve, vacuum breaker and filter included. Solid brass construction. Sensor range is adjustable manually and by remote control. Other sensor settings (sensor range, delay in, delay out and flow time) can also be adjusted by remote control. Sensor features a low battery level indicator. Prior flushing and sentinel 24 hours flushing upon request.