Ideally voltage transformers for off-road tours for charging batteries for cameras, headlights and night vision goggles. Because the cans form a secure hold in the can holder results in bad ground of distance (off-road tour). Also suitable to operate the laptop and load the photos from the memory chips on the hard drive (backup). Through storage possibility of the cable into the socket, there is no cable clutter. In addition, the cable can not be lost and the cable must not be sought only at the use. Great product, I recommend you.