The UHS Speed Class 3 rating found on the 128GB Pro Elite microSDXC Memory Card from PNY denotes a minimum data write speed of 30 MB/s making it easy to record video in a variety of formats all the way up to 4K. Aside from recording video this card is designed to be used both in smartphones and tablets, as well as various cameras and camcorders. In addition to an enhanced minimum data write speeds, this card also supports a maximum read speed of up to 95 MB/s and write speed of up to 90 MB/s for fast efficient file transfers. The versatile PNY Pro Elite microSDXC memory card comes magnet, shock, temperature, water, and x-ray proof for added piece of mind that your data will remain safe and secure nearly anywhere you go.