the wallpaper emits infra red, so it heats you and stuff in the room directly
unlike traditional heating which heats the air and the air heats everything else
i presume you actually need less energy and still be warm with the infrared emitter same way you dont feel cold even when its freezing and the sun is up
around 100$ if you build it yourself apparently
but it has some unique features, the display is wirelessly connected to the body and removable
it has serial console so you can connect it to a computer and log the measurements
it has a module bay, so you can make a module with a custom connector to measure its pins
it can measure current and voltage at the same time
nothing else stood out to me