Great gadget to have [SEP] Great gadget to have. I have tried it with a laptop, MP3 player, phone and even a pump for a blow up mattress for camping and there was no problem.  I received the item mentioned above for free or at a deep discount in the hope that I would review it. Regardless, I only recommend products or services I have used personally and believe will be good for other customers as well. If you feel my review has helped you in any way please click “yes” below.