Lexar High-Performance 633x microSDXC UHS-I Card 32,64,128GB

Quickly captures, stores, plays back, and transfers media files, including 1080p full-HD, 3D, and 4K video
Leverages UHS-I technology for a transfer speed up to 95MB/s (633x)
Includes high-speed, Class 10 card and SD adapter

NOTE from Lexar web site: Some of the new UHS memory cards may have a U1 marking, which refers to the U1 Speed Class designed for UHS-I card. The U1 Speed Class designates a minimum capture (write) performance of 10Mbytes per second for recording streaming video content. Note that although U1 is the same speed as Speed Class 10, they are tested differently, and meeting one does not imply that the other is met by the card. U3 Speed Class means that the memory card performance needs to reach 30MB/s to meet 4K resolution recording and play.

The cards for sale may be labeled either U1 or U3 while the cards in the photos are labeled U1. From the above message, it seems that U3 is a higher (faster) performance level than U1. Therefore, no adjustments will be made for claims regarding the labeling. You should assume the card you receive will be U1. If you specifically require a U3 card, contact us to check availability prior to purchasing.