product infomation
"SanDisk Extreme PRO microSD UHS-I card lets you capture uninterrupted 4K UHD and Full HD video with its UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings.
Quick read speeds of up to 170MB/s* let you transfer 1000 high-resolution photos and 30 minutes of 4K video (24GB) in less than 3 minutes.
UHS-I / V30 / U3 / Class 10
Max Read Speed: 170 MB/s
Max Write Speed: 90 MB/s
Min Write Speed: 30 MB/s
Records Full HD, 3D, and 4K Video
Built-In Write-Protect Switch" - - - - - - - china