Engineered for deployment in microSD devices such as smartphones, drones, and action cameras, specifically those capable of capturing Full HD and 4K video, as well as engaging in raw and burst photography, the 256GB Extreme UHS-I microSDXC Memory Card by SanDisk features a robust storage capacity of 256GB. This microSDXC card seamlessly interfaces with the UHS-I bus, boasting a speed class rating of V30, ensuring a dedicated minimum write speed of 30 MB/s. In scenarios where the V30 standard is unsupported by the device, compatibility extends to the U3 standard, which similarly guarantees a minimum write speed of 30 MB/s. Noteworthy read speeds reach up to 190 MB/s, while write speeds peak at 130 MB/s.SanDisk 256GB Extreme UHS-I microSDXC and Adapter Features:Storage Capacity: 256GBPerformance Ratings: A2 / UHS-I / V30 / U3 / Class 10Maximum Read Speed: 190 MB/sMaximum Write Speed: 130 MB/sMinimum Write Speed: 30 MB/sVideo Recording Capabilities: Full HD, 3D, and 4KDurability Features: Water / Shock / X-Ray ProofTemperature Resistance: Can Withstand Extreme TemperaturesBuilt-In Write-Protect Switch on AdapterIncludes Downloadable RescuePRO Recovery SoftwareSanDisk 256GB Extreme UHS-I microSDXC and Adapter Specifications:Quantity: 1Card Type: microSDXC with Full-Size SD AdapterStorage Capacity: 256 GBBus Type: UHS-ISpeed Class: 10UHS Speed Class: U3Video Speed Class: V30Application Performance Class: A2Maximum Read Speed: 190 MB/sMaximum Write Speed: 130 MB/sMinimum Write Speed: 30 MB/sOperating Temperature: -13 to 185°F / -25 to 85°CStorage Temperature: -40 to 185°F / -40 to 85°CBuilt-in Write-Protect Switch: On Adapter Only SanDisk 256GB Extreme UHS-I microSDXC and Adapter Micro Memory Card with SD Adapter, 256GB.