Another variant of this carpet spot cleaner. Looks a basic one. May only have the one brush as that's all I can see in the photo's (that's all you need).
https://bissell.com.au/products/spotclean
I had one of these for a few years before it broke (the liquid pump is pretty tiny and plastic, almost designed not to last) and it's ok. You have to be careful using it on car seats as the chemicals can bleach dark cloth a bit (might have been worth going over it a few more times filled with just water). The basic idea is one tank has a mixture of water and carpet cleaning chemicals which gets sprayed on and brushed (how much brushing is up to you), then you run over it in vacuum mode to suck it out.
You'd probably be better off using a hand spray pack and a proper wet & dry vacuum as that will last longer. Just a bigger thing to lug out of the cupboard.
I had posted one for $10 less on Amazon, but because the seller didn't have much feedback it was taken down. I suppose the thinking is low feedback means more unreliable seller, but isn't Amazon backing them up? Anyway there's one pretty much the same (that definitely has two brushes).