KSB-401R is a red permanent light element designed for use in signal beacons. It operates over a wide voltage range of 12-240 V AC/DC and is compatible with BA 15d bulbs (bulb not included). The unit weighs 0.46 oz and features an anti-twist device for secure mounting. This signal beacon light element is ideal for industrial signaling applications where visual status indication is required, providing reliable and visible alerts in manufacturing, process control, and automation environments.