Summary: This product is advertised as being able to power a laptop, but is not capable of doing so and produces an annoying beep. No instructions included. It will however charge my laptop battery when not in use so all is not lost. I have a 15" screen laptop. I recommend buying more powerful inverter if you want to actually use your laptop while on a long trip.
Cons: This has a lousy cigarette lighter connector that weakens after a few uses, to the point where internal spring on the fuse in the end is enough to push the connector out of the power socket. I had to wedge my leg up against it on a plane to keep it in the socket.
Summary: Bought this at a local store thinking it had more than just 90 watts and it just barely powerd my laptop, don't even think about powering anything bigger. I will be returning this soon and geting a different inverter. For the same price you can get a different brand with more watts and better preformance.
Pros: It works as advertised.
Cons: It only has 90 watts which barely meets the min requirments for notebook computers. It would probably be ok for smaller electronics.