These Premium High Speed Micro SD cards from Integral offer superior, super-fast read and write speeds - ensuring that you can record high-definition video and take burst mode photos with confidence. Product Features - Ideal for use in compatible smartphones, tablets, digital cameras, action cams, drones and game consoles - Fast read and write ensures smooth video capture even when shooting at 4K and Full HD. No lag or dropped frames - Ultra-fast read / write, with up to 100 MB/s* read and 50 MB/s* write (64GB, 128GB, 256GB) - Ultra-fast read / write, with up to 100 MB/s* read and 30 MB/s* write (32GB) - Video Speed Class 30 (V30) - A1 App Performance Specification - high IOPS ensures best performance - UHS-I, Class 3 specification - Complete with free protective case - 5 year warranty in compatible smartphones and tablets