4 Port Black SuperSpeed USB 3.0 Hub The ST4300USB3 4-Port SuperSpeed USB 3.0 Hub allows you to add 4 additional USB 3.0 ports from a single USB 3.0 connection to the host computer system. Backward compatible with USB 2.0 and USB 1.x standards, this USB 3.0 hub still supports older USB devices and can also be used as a hub on older systems that do not have USB 3.0 ports. With the capability to mix and match USB 3.0/2.0/1.x devices and be used with or without the included external power adapter, this hub offers the best of versatility and portability. Backed by a StarTech.com 2-year warranty and free lifetime technical support. Connect up to four USB 3.0/2.0/1.x devices simultaneously at their respective maximum speeds Can be used with or without an external power adapter to balance portability with the need to connect high powered USB devices Backed by a StarTech.com 2-year warranty and free lifetime technical support Features Four USB type A ports that can each be accessed simultaneously SuperSpeed USB 3.0 compliant, with data transfer rates up to 5 Gbps Backward compatible with USB 2.0 and USB 1.0/1.1 specifications and devices Supports USB 3.0/2.0/1.x devices simultaneously, at full bandwidth Provides up to 900mA of power per port Compact, desktop-style form factor Plug-and-Play and hot-swap compatible Applications Expand your system USB 3.0 capabilities with additional ports Make hard to access USB ports more accessible, by being able to position the hub anywhere the cable will reach Extend the range of a USB device by having the hub act as a mid-point repeater Technical Specifications Warranty 2 Years Color Black Connector Type(s) 1 - USB B (4 pin) Female Connector Type(s) 4 - USB A (4 pin) Female Enclosure Type Plastic LED Indicators 1 - Power (Blue) Ports 4 Product Height 0.91 in [23 mm] Product Length 3.74 in [95 mm] Product Weight 1.94 oz [55 g] Product Width 2.68 in [68 mm] System and Cable Requirements USB 3.0 or 2.0 or 1.x compliant host controller with available port. Maximum Data Transfer Rate 5 Gbps Power Adapter Included Yes Input Voltage 110 ~ 240 AC Output Voltage 5 DC Output Current 2000mA Center Tip Polarity Positive Plug Type M Humidity 5~85% RH Operating Temperature 0°C to 50°C (32°F to 122°F) Storage Temperature -20°C to 60°C (-4°F to 140°F) Chipset ID VLI VL810 OS Compatibility Windows XP(32/64-bit)/ Server 2003(32/64-bit)/ Vista(32/64-bit)/ Server 2008 R2/ 7(32/64-bit), Mac OS 10.2 ~ 10.6 Shipping (Package) Weight 10.59 oz [300 g] Carton Quantity 20 Note If used with the Apple Mac OS operating system, this device will function in USB 2.0 mode only.