1.Ultra-thin Upgraded Version: Long-lasting premium aluminum material designed to complement Apple products. No more banding yourself to strange angle just for plugging a USB device onto your iMac. 2.Brings three more USB ports and SD/TF card readers to the front side. Supports SD, SDXC (up to 2TB), SDHC, Micro-SD, Micro-SDXC, Micro-SDHC cards. 3.Super-speed USB3.0 ports save on syncing time with data transfer rates of up to 5 Gbps. Backward compatible with USB 2.0 / 1.1 specifications. 4.Anti-slip rubber sleeves for complete stability can protect your iMac from scratches; Blue LED indicator reveals the power status; Built-in surge protector safeguards your devices; Easy to set up. Plug & Play, Hot-Swappable. 5.Exclusively designed for the iMac Slim Unibody model released November 2012 or later. (21 inch / 27 inch / 5K); Operating system compatible with OS X 10.6 & higher, Windows 98SE /ME /2000 /XP /Vista /7/8 /10, Linux 2.4 or above. Rocketek ultra-thin premium aluminum 3-Port USB 3.0 hub with SD/TF card reader combo is exclusively designed for iMac. It adds three USB 3.0 ports and SD/TF card reader slots to the front side of your iMac. There is no more need to twist cables to get to the ports vertically. Now you can easily access USB ports and additional 2 slots card reader at an ergonomic angle! Its sleek aluminum design the perfect complement to your iMac computer. It does not require any software or complicated installation process. With a slim design, it saves you precious desktop space. System requirements: Mac OS X 10.6 & higher Windows 98SE /ME /2000 /XP /Vista /7/8 /10 Linux 2.4 or above Usage Alerts: 2.4Ghz wireless devices, such as wireless keyboard and mouse adapters, may not work in close proximity to USB 3.0 devices or hubs. Connecting to a USB 2.0 port is recommended. This hub is not designedto serve as a standalone charger and will not charge an iPad tablet or any other device with non-standard charge requirements. For a stable connection, the devices connected to the 4-Port USB 3.0 Hub must not exceed a combined current of 5 volts 900 mAh. External hard-drives should be connected to an external power source. Colour: silver Material: aluminum alloy Size: 108 x 34 x 11mm, cable length 115mm Package Contents: 1 x USB 3.0 hub 1 x User Manual Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.