I wouldn't let it near my empeg - the blurb mentions 800F operating temperature, with peaks possible "that excedd 1000F", which is too hot. It is also clear that the iron is not even power regulated let alone temperature regulated - power output is quoted at 25-50W, suggesting that it is dependant on battery voltage. There isn't any obvious means of controlling the power output either. There is also the issue that it is obviously not static-safe.

For simple electrical work it might be useful.