The SD 4.0 Card Reader from SmallRig is an ultra-high-speed card reader designed to conveniently magnetically attach to a smartphone, tablet, or laptop that can transfer data quickly and minimize downtime while shooting. It features a MagSafe-compatible magnetic mounting surface, plus a built-in USB-C cable with a right-angle plug that won't get in the way. This stylish SD 4.0 card reader has a speed of 312 MB/s and can transfer 1GB of data in just 3 seconds.