Get extreme speeds for fast transfer, app performance, and 4k uhd video. ¹ ideal for your android™ smartphone, action cameras or drones, this high-performance microsd™ card handles 4k uhd video recording, full hd video and high-resolution photos. The super-fast sandisk extreme® microsdxc™ memory card reads up to 160mb/s* and writes up to 60mb/s. * plus, it’s a2-rated, so you can get fast application performance for an exceptional smartphone experience. ² memory card features 64gb class micro sdxc card transfer speed: up to 160mb/s write protect switch: yes adapter included: yes 4k uhd and full hd-ready with uhs speed class 3 (u3) and video speed class 30 (v30)