The Legrand S 304 B3 DX is part of the Legrand XAP Wall Switches product range. It is a switch with 3-way switching, a toggle switch, and illuminated push buttons. It also features a three-position adjustable timer, which can be adjusted to 5 seconds, 15 seconds, and 30 seconds. The S 304 B3 DX is designed to provide users with more flexibility and control over how power is distributed in their home. It is also capable of controlling 50W/230V loads such as lights, motors, pumps, and fans. The switch is fitted with a metallic red LED ring to indicate when the switch is on or off.