The Blackmagic Duplicator 4K is like two recorders in one! Featuring an advanced 12G-SDI design, 25 SD card recorders, and built in hardware encoders for H.264 and H.265, the Blackmagic Duplicator 4K can be used for either live duplication or long form recording. When used as a duplicator, it can simultaneously encode and record onto 25 SD cards at at time. When used as a long form recorder, it can record non-stop for weeks at a time. Multiple units can also be chained together for even longer recording times!