Piranha E-force, shocktech drop, crossfire 68/3000 nitro, and Reloader
Sound Activated and auto turnoff.
The batteries add alot of weight and the shell isn't very thick.
Since it is sound activated it doesn't wait till a ball is not feeding. Meaning less balls get choped. It is good hopper for a fast finger and worth the money. I haven't had a problem with mine althouth a friends shell broke. But you just have to be carfull when you take it off.
Get it. Not bad for the price and i haven't had a problem yet.