64GB Pro II Plus 1900X microSDXC Memory Card with Adapter, UHS-II V90 U3 Class 10. Next-generation memory cards for next-generation performance. Verbatim's Pro II Plus microSDXC memory cards take advantage of the UHS-II interface to deliver next-level performance ideal for capturing 8K or 360 video. These cards keep up with even the most advanced users, using blazing-fast writing speeds of up to 255MB/s. Then get back to shooting in record time, using breakneck 295MB/s read speeds to transfer files in a flash. Additionally, microSDXC cards feature extended capacities, which means you can shoot longer without changing cards. Safeguard all that valuable work - these cards are water-resistant, shock-proof and temperature proof. Backed by a Limited Lifetime Warranty, Verbatim creates technology you can trust. Requires SDXC host device. For optimal performance use with UHS-II devices. V90 video speed class - supports 8K video recording, UHS-II interface, U3 speed rated, Up to 295MB/s read speed, Up to 255MB/s write speed, ater resistant, shock proof and temperature proof. Limited Lifetime Warranty.