64 GB Micro SD Card Pre-Programmed with NOOBS, Class A1 - PiShop.ca
What do the abbreviations A1 and A2 mean on SD cards?
64G micro SD card U3/V30/A1 with adapter 4 packs memory card suitable for home surveillance camera hunting camera and driving recorder memory card K&F CONCEPT - KENTFAITH
SanDisk Ultra Micro SD A1 Card 128 256 GB Memory for Reolink Monitoring Camera | eBay
All about SanDisk's microSD cards with the new A1 speed class - HardwareZone.com.sg