4-Port USB Hub Blocks Calendar

USB high-speed interface, data transfer speeds up to 480 Mbps
Backwards compatible with the USB 1.1 products
System requirements: Windows 7 8 10 etc.,Linux and Mac os 8.5 or above.Plug-and-Play; hot-plugging; driver free
Also be a creative desk calendar bricks,just make the adjustment once a month, then can use it forever
Size:11×9.5x3cm/4.33×3.7×1.2 inch, weight 7.0 ounces.Available in pink, green, blue, yellow