Product Description USB 3.0 combo Hub 28port w/switch USB 3.0 port compatable USB Revision USB 2.0 specifiaction Provides data transfer rate 480Mbps to 5GMbps Bus power mode and self power Plug and Play USB Combo Hub with 3 Port USB 2.0 and 4 Port USB 3.0(USB3-001) USB Combo Hub with 6 Port USB 2.0 and 4 Port USB 3.0(USB3-002) USB Combo Hub with 24 Port USB 2.0 and 4 Port USB 3.0(USB3-003) 7 ON/OFF switch control your USB devices and power LED(USB3-001) 10 ON/OFF switch control your USB devices and power LED(USB3-002) 28 ON/OFF switch control your USB devices and power LED(USB3-003) Dimensions: 8.4 x 2.7 x 1.6cm (WxDxH)(USB3-001) Dimensions: 18.2 x 4.9 x 2.0cm (WxDxH)(USB3-002) Dimensions: 23.0 x 11.0 x 2.1cm (WxDxH)(USB3-003)