The ProMaster Trifecta Deluxe Card Reader has three types of connections (USB-C, USB-A and USB Micro-B) along with iOS and Android OTG (on-the-go) compatibility for broad connectivity with your computer, tablet, and phone. Its dual slots accept SD and MicroSD cards, and the Trifecta can access them simultaneously as independent drives to allow for easy file transfer and copying. The reader's UHS-II capability allows for ultra-fast transfer speeds of up to 300MB/s. (UHS-I cards work at UHS-I speeds.) With all this functionality, the Trifecta is less than 3” long and weighs under an ounce, so it's easy to keep on hand for whenever you need it.