What is UHS 1 on SD card?

Related questions

1. What is better UHS 1 or UHS 3?
2. What's the fastest microSD card?
3. Can I use SD card in SDXC slot?
4. Do SD cards affect video quality?
5. Do SD cards affect image quality?
6. What is UHS Micro SD card?
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8. What is a UHS II SD card?
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Tags

1. #stands
2. #cards
3. #ultra
4. #memory
5. #speed
6. #class
7. #interface
8. #accurately