Features: 1.Ultra-thin Upgraded Version: Long-lasting premium aluminum material designed to complement. No more banding yourself to strange angle just for plugging a USB device onto your device. 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 device 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 Slim Unibody model released November 2012 -2019. (21 inch / 27 inch / 5K); Operating system compatible for OS X 10.6 & higher, for Windows 98SE /ME /2000 /XP /Vista /Win7/Win8 /Win10, for Linux 2.4 or above. Specifications: Colour: Silver Material: Aluminum Alloy Size: 108 x 34 x 11mm, cable length 115mm 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 for compatible with 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. Package include: 1 x USB 3.0 Hub