Also I checked the price of the inverter off the net from Harbor Frieght and it was $19.95 at the store it was $29.95. I asked why the big difference in price and was told I was paying for the store front. But I could go home order and pay the frieght for $19.95.
Carry the printed copy of the web page and they will sell it to you for the same price. Always check the web. Harbor Freight bears watching.
Bill