Atomos Ninja V 4k External HDMI SSD Recorder and 5" Touchscreen Monitor
This is a high end external recorder and monitor for digital cameras. Use it to shoot high quality video onto an SSD (not included) with less compression. I used a different version of this recorder/monitor on many shoots during film school.
This one is in excellent condition, the plastic cover is still on the screen and I don't think that it's ever been used. The packaging shows moderate wear but it has plenty of life left. The AC cable is included but you'll need to get batteries separately (available from other sellers).