UHS-II cards offers even faster speeds than UHS-I by using two lanes for data transfer via two rows of pins. It does work in 2 modes: in Full Duplex mode data can be transferred in both directions at the same time. Half Duplex switches both lanes to the same direction, i.e 156MB/s in Full Duplex can be switched to 312MB/s in Half Duplex for UHS-II. We stock selection of top speed UHS-II memory cards.