[DETAIL] Weight :54g Size:10.5*3.5*2cm 4 port high speed USB 2.0 HUB Each HUB with ON/OFF switch, easy to control. Over current protection 5V/1A converter is required(Not included) supports up to 480 Mbps data transfer rate and is ideal for alleviating desktop clutter! Connect USB devices such as a Webcam, mouse, Printers, Scanners and more Hot Plug and play Friendly and ergonomic design. Daisy-chain connection of up to 127 devices Fully compliant with USB specification version 2.0, backward compatible with USB 1.1 Compatible for Windows 98/SE/2000/ME/XP/Vista/7/8, Linux, Mac OS etc. Package Content: 1 x 4 Port USB 2.0 HUB [ATTRIBUTES] - Hign-concerned Chemical: None - Material: PVC - Maximum Current: 2A - Hign-concerned Chemical: None - Material: PVC - Maximum Current: 2A - Features: Other - Has Retail Package: No - Origin: Mainland China - Certification: CE