Optimise your action camera's performance with the 256 GB Sandisk Extreme Pro Class 10 microSDXC Memory Card.This hard-wearing microSD card is waterproof, x-ray and shockproof, making it the ideal travel companion.With transfer speeds of up to 170 MB/s, you can quickly and easily move your data, helping to save you time. Plus with Class 10 and UHS Speed Class 3 rating, you can capture 4K Ultra HD video without dropouts and stuttering. This memory card comes with an SD adapter, allowing you to use it with an SD card slot.