Verbatim Pro U3 Micro SDHC/SDXC Cards Verbatim Pro microSD memory cards give Pro level performance to action cameras, camcorders, smart phones & tablets. UHS Speed Class 3 (U3) rating means you can capture 4k ultra HD and Full HD video then transfer quickly to your computer for viewing and editing. Compatible with any device with an SDHC/SDXC* memory card slot. Verbatim Pro microSD memory Cards are waterproof & shockproof. microSD to SD adapter included. Read Speed: up to 90MB/Sec.** Write Speed: up to 45MB/Sec.** Suitable for 4k ultra HD video capture *SDXC compatible host device required **UHS-1 compatible device required, actual performance may vary depending on host device, interface & usage conditions Product Dimensions: 11mm x 15mm x 1.0mm (L x W x H) (microSD only) Product weight: 1.6 grams (microSD+ adapter) Capacity: 64GB System requirements: Compatible with smart phones, tablets, mobile phones, and other microSDHC/SDXC compatible devices.