The Zap Mach 404 is an agitated hopper that works on sound activation. I would really recommend it for rec or entry level tourney players. It’s not the fastest one out there, but you can get it up to 12pbs. It’s also pretty light, very easy to maintain and clean. The best thing in it is that it has an amazing battery life. It really feels forever before you make a battery change. It’s one good hopper to have and if you really don’t have a pile of money to spend on a super loader I would suggest you consider getting this one. You should know the cons you’re facing first, though. Starting with the weird vibration, but with the time you get used to it and stop noticing it anymore, so it’s not that big of a deal. Another important issue: it is only fitted for zap guns, so you may need to do some electrical tape adjusting to get it to fit to other markers. It’s just some time consuming and a little irritating. Also note that when the loader gets to about 10-15 balls left in the hopper, it has a tendancy to ping pong them. The solution is simple again – refill. And those are just about all the bad things I have to say about it. I think you’ll like it. It’s pretty reliable and trustful. You can get it for about $40, depending on the place which is not too bad, right. If you ask me it’s just the right price for it. Try it if you get the chance. You may like it very much.