No plug in. Perfect for those who live off grid, occasional use.
Easy to use, but careful if you have long hair, as I do.  Long strands tend to get snagged, so I only curl lower 1/3. Heats up very quickly., so need quick release. They claim "dry/wet amphibious ", but commonsense tells me not to even think of using this on wet hair.
Rating: 5 stars