Listed as for parts as I cannot test. It does power on with a 5v power adaptor as shown. It does NOT come with any power adaptor or cords, just the unit.

The StarTech.com 2 Port USB Serial RS232 Adapter ICUSB2322I is a versatile adapter designed to allow connection of two RS-232 serial devices to a computer via USB. With its sleek black design and reliable StarTech brand, this adapter is compatible with various models and offers a convenient 1:2 connection split. The adapter features USB and serial RS-232 connectors, making it easy to expand the connectivity options of your computer for a range of devices. Ideal for those in need of a compact and efficient solution for serial communication.