Up to 170MB/sec read and 90MB/sec write speeds for fast image capture and file transfer With A2 performance rating, it can quickly load and run apps Meets UHS Speed Class (U3) and Video Speed Class 30 (V30)5, capable of capturing 4K UHD video Shock-resistant, cold-resistant, heat-resistant, waterproof, X-ray-resistant Ideal for Android smartphones, action cameras and drones Performance/Speed: 64GB-400GB: Up to 170MB/sec read, 90MB/sec write Compatibility: Compatible with host devices supporting micro-SDXC, UHS-I, micro-SDXC UHS-I Operating temperature: -25°C to 85°C Storage temperature: -40°C to 85°C Memory card size: 10.92mm x 14.99mm x 1.02mm SD adapter size: 31.75mmx23.88mmx2.03mm The product appearance and printed words may vary depending on the batch, but this does not affect use Specifications: 256GB/128GB Colour:As Shown Material:plastic<br><br>Package Contents: 1 x SD card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.