No, the Sumo 19M is a dedicated monitor. The 'M' stands for Monitor. If you require recording capabilities, you should look for the standard Atomos Sumo 19.
Yes, with a peak brightness of 1200 nits, the Sumo 19M is designed to be used in bright outdoor environments without a sunhood.
It can be powered via a standard AC 110-240V wall outlet or through dual 4-pin XLR inputs using V-mount or Gold-mount battery plates (sold separately).
Yes, it accepts 4K signals via HDMI 2.0 and 12G-SDI, though the physical panel resolution is 1920 x 1080.