I was looking on-line and on ebay as well and couldn't find any mention whether it was Pure Sine Wave or not. Usually if it isn't mention you can be sure it isn't...
I got too much electronics on my Power Inverter to trust anything except SINE WAVE type power...
Sounds like a great price however... I use a couple of low wattage elcheapo units here for outside lights only...
I started out with a 150WATT size and went to 300WATTS and after I found out how neat they were to have around I ended up with my work horse Power Inverter being a 600WATT PSW model. ALways nice to have extra wattage just in case you need need it... My daily runs when camping OFF ROAD usually draws around 300WATTS demand between the 6PM to 11PM when we are in turning in for the night...
Roy Ken