Ourkens USB 3.0 Premium 4 Port Aluminum USB Hub with 2-Foot USB 3.0 Cable for iMac, MacBook Air, MacBook Pro, MacBook, Mac Mini, PCs and Laptops - Lifetime Warranty(USB 3.0 4-Port Hub) Expand your Macbook: Equipped with 2 USB-C, 2 USB-A 3.0, MicroSD/TF and SD card slot, this hub enables high speed data transfer from your smartphone, flash drive, camera or other standard USB-A or USB-C devices. High Speed: Unlike most USB-C dongles which still run on slow USB 3.0 (4Gb/s) speed, this device is 10X faster by using not one but two USB-C connections. Simultaneous Data & Power Transfer: Capable of charging any of your USB-A or USB-C devices while having all of its data ports in use at the same time. Ultra Slim & Stylish: Designed to be compact enough to stay with your MacBook Pro wherever you go. The brushed aluminum design complements Apple's distinguished style. Satisfaction Guaranteed: We back up each order with a 30-day full refund and 12-month warranty to ensure your total satisfaction. If you are not satisfied for any reason, simply return it to us for your money back without any questions.