This product its meant to provide power to small devices that are usually operated using car's DC adapters. In theory this products works, it powers small devices like cellphones and GPS, but if you try to use some high amp device with this adapter it simply doesn't work. Let me give you and example. We bought some inflatable jumper for Christmas and I thought I could use the car's air pump (DC powered) along with this adapter to inflate the jumper inside the house rather than having the car running on the driveway for 2hrs while the thing gets inflated. Well, guess what, the adapter could not deliver the required amps to power up the air pump, so in the end I had to spend a few hours on Christmas Eve pump enough air into the jumper. So, it would be nice that in pre-sales info there is some additional info about the specs on the amps, voltage, etc. This would help the customer decide whether this product is a must have versus a nice to have.