Multiple Use: Turn USB-A port of your device into USB-C port for fast charge, data transfer or audio pass through. Fast and Stable: Provide you fast and stable charging up to 5V/3A, 9V/2A and data transfer up to 480 Mpbs. Durable and Reliable: Premium zinc alloy shell for durable service and Delicate embossment appearance designs for not slipping. Compact and Portable: Ultra compact size which is smaller than a coin. Easy to carry or store, fit side by side on your laptop. Comes with one pack of 4: One for home, one for office, one for car and one for backup. PLEASE NOTE: It will NOT work with Apple MagSafe Charger or transmit any video signals.