Designed with compact size and lightweight, this USB 2.0 hub is made with 3 USB ports and it is quite convenient to use. Backward compatible with the USB revision 1.1. Giving out red light when connected with computer. You can connect it to any devices with USB port. Quite easy to carry. Description:Novelty and special design of this Traffic Light USB Hub The Novelty USB Hub is fully compatible with USB 2.0 & 1.1 specification. Plug and play, no external power supply needed. The PC 3 Port USB Hub features with traffic light (only red light will power on) Extent your USB port, connect any USB devices via USB ports. Data transfer rate of the Computer USB 2.0 Hub is up to 480 Mbps. Individual port is designed with over-current protection. The upperest light inlaying the hub will give out red light when it is connected. Support windows 2000/XP/Vista Size: 15cm high. The base: 6.5cm in diameter. The USB cable: 43cm long. Approx. Weight: 91g.