4 Ports USB Hub with new technology power cable, there is no need for an AC power adapter. You can use 4 USB device at the same time with it. Square shape make you take it to anywhere anytime. Description:High Speed 4 Port USB Hub complies with the new USB 2.0 specifications and offer automatic USB protocol handling.With self powered and easy to install.Made of plastic.4 Ports USB Hub with new technology power cable, also support DC 5V power adapter ( here is not included )Specification:The most tiny, fashionable USB 2.0 hub.Connect up to 4 USB 2.0 or USB 1.1 devices.Speed supported: 480Mbps.Hot swappable, connect and remove peripherals and time.USB both USB connectors or power cable to increase power for your connected equipment from 500mA to 1000mA.USB Port Hub system requirement: windows ME/2000/XP and Mac OS 9.0 or above.Size: ~6.9 x 6 x 2cmWeight: 90gPackage content:1 x 4 Ports High Speed USB 2.0 Hub1 x USB cable