SanDisk 256GB Extreme A2 UHS-I microSDXC High Speed Memory CardSanDisk 256GB Extreme A2 UHS I microSDXC Memory Card High speed, high capacity microSD for creators up to 190MB s read and 130MB s write for smooth 4K capture and fast transfers. UHS I U3 V30 A2 Ideal for 4K UHD & action cameras Durable: water shock X ray temp proof Key Specifications Capacity 256GB Max Read Speed Up to 190MB s Max Write Speed Up to 130MB s Speed Class UHS I, U3, V30, A2 Format microSDXC Operating Temp 25C to 85C Why this card? The