This power supply unit is designed for use with iRobot Roomba 500, 600, and 700 series. It has been fully tested and is guaranteed to work. The unit has a power output of 33W and is compatible with iRobot Roomba 500 series models. The power supply unit is white in color and is suitable for household use. It comes with a set that includes a power supply. This unit is an excellent replacement for your iRobot Roomba power supply needs.