This is a 20 Watt, 24VDC power supply. Made for the Philips Hue Signe, Bloom, Iris, lightstrip, and Play gradient light tube. This version comes with the North America style 2 prong plug adapter, and also includes an 8' long barrel plug cable to connect to the power supply.
Note if using as a replacement: Philips has modified this power supply multiple times in the past: This version is current, and uses a larger 3 mm ID male barrel plug [Model number: S020YM2400083]. The cable to make the connection is included.