This is a Dell Optiplex 240W power supply with a 24 pin connector and voltage compatibility of 100-240V. It is compatible with Dell Optiplex desktops of the 390, 790, and 990 series with a small form factor. The power supply has a maximum power of 240W and is cooled by a single fan. It is also 80Plus certified. The model number is D240ES-00 and the Dell part number is 0592JG/592JG.