The Dell L255AS-00 255W Power Supply Unit is a small form factor power module designed for use with Dell OptiPlex 3020 SFF, 7020 SFF, 9020 SFF, and Precision T1700 SFF computers. This unit provides a maximum power output of 255W and features surge protection and noise filtering capabilities. With one fan for cooling, this silver-colored power supply unit is compatible with 100-240V AC voltage inputs and offers 8-pin and 4-pin connectors for easy installation. Made by Dell in China, this unit is a reliable option for maintaining stable power supply in your computer system.