Two outdoor standing space heaters. Manufacturer unknown.
Each has an adjustable-height circular shelf for drinks around the halfway point.
The bottom part is a compartment for a propane tank, with a belt to secure a tank as well as tube with standard propane tank connection. This compartment is accessed with a small door that can be closed and clamped to stay shut. A propane tube runs from this lower compartment, through the body of the unit, to the upper heater part (covered by the old cover in these photos); that heater has a fire-starter that is a simple button (a AA or AAA battery is required, I forget which). Once lit, flame emits from all sides from this cylindrical top. A simple knob next to the button allows control of propane flow.
Large flat saucer-shaped metal "lids" can be attached to sit on top of the units, directing the heat downwards. These are removable when the units are not in use (see them at the top of one of the photos), they can be affixed with a few wingnuts once they units are standing. I don't have the matching wingnuts anymore, those parts have been lost, you should plan to get replacements for these.
These have a pair of wheels for moving around, you tilt them back and can easily push them on the wheels (like a "dolly").
One of them has a weight on the bottom for added stability (black cylinder seen in photos). The other one is lacking this, it broke apart. You'll want to replace this with another source of weight for stability, especially in any place exposed to high winds.