Butane heater from Kmart - takes standard butane cans, same ones as the popular stoves.
You have to use them outside as they produce carbon monoxide as they burn and that can kill. Good heat output relative to size (6,700 BTU) good for camping but definitely not inside a tent.
Seems identical to the Gasmate one that Anaconda sell for $99
Runs for about 1-2 hours depending on setting
In store only now
It's probably a good deal, but I feel like it's a bad product