Accepts input voltage in a range of 120 - 277VAC and outputs 24VDC power up to 25 watts. Can be used as a dimmable or non-dim Power Supply. The low voltage output dims down to 7% when two additional wires are connected to a 0-10V dimmer. The enclosure provides a space inside for electrical connections. In-Wall Power Supply Kit includes power supply, box cover and stud hangers for installing Junction Box in wall.