This is a very useful device. We use it often as a portable 12v supply and have used it to help start a friends boat when he ran down his start battery (scary predicament!).
These are inexpensive and provide:
- portable 12v
- 110v AC
- tire inflation pump
- a flash light (ours died almost immediately).
note: The internal 12v wet cell battery in this unit died after several years. We were able to find a replacement in Suva Fiji. Hopefully we are good for another few years.