The Wattstopper FS-C1 is a 10-foot extension cable with standard RJ45 plugs for use with the FS Low Voltage Fixture Sensor series. It extends the connection between the FS-PP Fixture Power Pack and compatible FS sensors, delivering 24VDC operating voltage where additional cable reach is required. Designed for straightforward plug-and-play integration within the Wattstopper FS ecosystem.