Product Detail for Kingston – Micro SD Card
Understanding speed classes
The SD card association defines card speeds using two terms: Speed Class and UHS Speed Class.
- Speed class is the original rating used and the number defines the card speed; 4 for 4 MB/s, 6 for 6 MB/s. etc.
- UHS (Ultra High Speed) uses minimum write speeds to differentiate the cards; UHS-I Speed Class 1 has a minimum write speed of 10 MB/s while UHS-I Speed Class 3 has a minimum write speed of 30 MB/s.