The Belkin Express HubUSB Port F5U001-BLU is an adapter specifically designed for the Express Bus model. With a USB connector, it allows for easy connection and expansion of devices. The product also includes an AC adapter for power supply. Belkin is a trusted brand known for quality electronics, making this adapter a reliable choice for computer users looking to add additional USB ports. Looks to be unused. This has been tested to turn on, measures 5.25" x 3"