The Nextbase 128GB U3 micro SD card and adapter is the perfect partner for all Nextbase Dash Cams. It is required for the Dash Cam to record the road ahead in full HD, 1440p, or 4K quality and is required for use with Nextbase Rear Camera Modules. With a capacity of 64GB, it will record approximately 8 hours of footage before the Dash Cam overwrites previous recordings, and up to 4 hours when using a Rear Camera Module. With a read speed of up to 100MB/s and write speed of 70MB/s, this is the ideal microSD card to capture footage on your Nextbase Dash Cam. It includes a microSD card adapter, to easily transfer footage to your PC/Mac