Get the most performance out of your smartphone, tablet, camera, and other compatible devices with the 128GB Catalyst UHS-I microSDXC Memory Card from Exascend. Designed to capture raw 4K videos without dropping frames and burst photography, this 128GB memory card delivers maximum read speed of 170 MB/s and write speeds up to 140 MB/s. The V30 Video Speed Class rating guarantees minimum write speeds of at least 30 MB/s, while the A2 class rating provides fast loading app performance. This rugged card is also made to withstand extreme environments with a waterproof, dust-resistant, and impact-resistant design that can operate in temperatures of -25°C to 85°C. This card can also withstand X-rays and magnets.