Its reliability and high performance make the SD memory card PRO Plus an attractive choice for photo professionals, creative professionals and anyone who works with digital media. The Video Speed Class comprises the five speed levels V6, V10, V30, V60 and V90, where the number indicates the minimum write rate in megabytes per second (MB/s). By combining a device with a Video Speed Class label and an SD memory card with the same Video Speed Class label, you can capture memories in the best quality. The fastest options V60 and V90 support 8K resolution, while V6, V10 and V30 reliably capture Full HD and 4K resolution. UHS-I capable SD cards enable theoretical data transfer speeds of up to 104 MB/s. The speed class is specified as U1 or U3: U1 for full HD videos - and U3 for 4K videos. Memory cards with support for UHS-I are backwards compatible and can be used in devices without UHS support (with limited performance).