Yes, much better pics.
It's using a CVT and then chain to a fiber gasket bolt-on type sprocket. Looks like a Mitsubishi clone 2 stroke.
It says it comes with a "hand brake type accelerator cable", so you might be covered there if it's long enough to reach the bars. You'd probably want a kill switch and wire on the handlebars, these engines usually have a switch right on the engine. The ad doesn't really show if you get the wheel sprocket. though.
Overall, it's an interesting set-up, the first of it's kind I've seen. Whether it would be more reliable than an HT, hard to say but my guess would be yes it would. These Chinese Mitsu clones are usually much better than HTs. They are very loud though. Part of the reliability question would be how the CVT holds up though lots of guys here use that type CVT with decent results. The sell for around $60US. One could also probably substitute out the rear sprocket attachment to a BMX free wheel type.
The thing that jumps out the most though is the price. If I'm reading the ad correctly, right now it can be bought for $105AUS shipped. It I could get one for $100US shipped I'd buy one as soon as I submit this reply, lol. The stainless cradle alone would cost me that to have fabbed. How could you go wrong?
Thanks for sharing and let me know if you pull the trigger.