Runs on 2 14500 batteries, stuffed inside is a Ti 7805 5v regulator, 1 blue led on the top right corner, safety on/off switch on the bottom, atty switch in the top left finger groove. Fits in th palm of your hand just like a fistpack..(not recommended for fighting with).
Sitting next to a 2xAA battery box for size comparison. Took a bit to get used to 5v vaping, now I cant seem to go back to any 3.7v devices
