Features:
4-port USB 3.0 hub.
Supports Windows XP， Vista， Win7 (32/64bit)， Mac OS X or above. 
Supports data transfer rates of USB 3.0 Super-Speed (5Gbps)， USB 2.0 High-Speed (480Mbps)， USB 2.0 Full-Speed (12Mbps) and USB 2.0 Low-Speed (1.5Mbps).
Backwards compatible with USB 2.0 !#!amp!*! 1.1. 
Plug and Play， no driver needed.
Supports hot swap.
Blue LED indicator.
Built-in on/off switch to manage the power and protect USB device connected. 
Including a 5V 2A power adapter ensures stable power supply for some devices requiring strong power. 

Specifications:
Brand: Unitek
Model: Y-3042
Interface: 4-Port USB 3.0
System supported: Windows XP， Vista， Win7 (32/64bit)， Mac OS X or above.
Power adapter: Input: 100-240V， 50/60Hz; Output: 5V， 2000mA; US plug， EU plug， UK plug
Product color: Black
Material: ABS
USB 3.0 cable length: Approx. 80cm / 2.6ft
Hub size: 8.5 * 5.6 * 2cm / 3.3 * 2.2 * 0.8in
Hub weight: 59g / 2.1oz
Package size: Approx. 19 * 14.5 * 8.5cm / 7.5 * 5.7 * 3.3in
Package weight: Approx. 263g / 9.3oz

Package list:
1 * 4-Port Hub
1 * USB 3.0 Cable
1 * Power Adapter