ThunderboltTM 3 certified - ensures compatibility across all devices and an optimal user experience Adds a wide variety of ports to your MacBook Pro (13"/15") instantly. Includes - one USB-C Thunderbolt 3 port, one USB-C port (USB 3.1 Gen 1), two Type-A USB 3.1 Gen 1 ports, one 4K@30Hz HDMI port, one SD slot, one Micro SD slot USB-C Thunderbolt 3 port supports Power Delivery (PD) protocol enables charging of your 13" (61W) or 15" (87W) MacBook Pro at full speed from PD compatible power adapter, provides up to 5K video resolution, up to 40Gbps data speed (Thunderbolt) and USB 3.1 up to 10Gbps data transfer rate HDMI port supports up to 4Kx2K@30Hz video resolution, extend your desktop across multiple screens Provides 3 USB 3.1 Gen 1 ports (x1 USB-C, x2 USB Type-A) with data transfer rate up to 5Gbps Memory card reader supports SDHC (UHS-I), SDXC (UHS-I), MMC, microSD (T-Flash), microSDHC (UHS-I), and microSDXC (UHS-I) memory card up to 2TB capacity (max) Note: Insert SD/MMC cards with gold pins forward and facing up, for microSD/T-Flash cards insert them with gold pins forward and facing down Aluminum housing and a compact design makes it a great connectivity expansion companion and matches perfectly with your MacBook Pro Enables you to connect multiple USB peripherals simultaneously such as mouse, keyboard, flash drive, printer and more Plug-n-play, no driver or software installation required Built-in power LED for power status confirmation