Yes it is a straight 3.7 mod kinda.....Its for experienced vapors......There is really no reason for all the circuitry or fuses in something this small....Its more for a comfort mod....As the batteries lose there power the vape will change. Not as good as a hit you might say..... hats when its time to change the batteries!........All the other stuff costs money..........If you use protected batteries they will only go so low in power loss ,,,, Easy to notice the loss of power.....And talvet ill have more done soon ....shot me a message lets see what we can work out............TY