Directly connected to the computer, without external power supply, simple and easy to use.* The second generation USB HUB controller is adopted, which supports plug-and-play and hot plug functions.*USB2.0 interface, supporting USB1.0/1.1/2.0, transmission speed 1.5/12/480MBPS.* Built-in current overload short circuit protection device.Plug-and-play is suitable for notebook computers, PDA's and all kinds of small and portable PCs.* system support: win 95/98/me/2000/XP, Linux 2.4 and MAC OS 8.5 or above.* Streamline ultra-miniature design.* Adopt high-quality electronic devices to ensure stable operation.* Lightweight and easy to carry.Brand-new design, more avant-garde and more fashionable. High-speed USB 2.0 4PORT HUB, the design is very beautiful, bright and lovely. This product is compact and easy to carry. Multicolor mixed hair.Working indicator lampWorking humidity: 10%-90%Operating voltage: 5VWorking current: 500mAWorking temperature: -20C-75CStorage temperature: -40C-85CPacking weight: 16.5*8*1.5cm, 45gPacking specifications: 42*31.5*42.5cm, 250pcs, 11.8kg