Disclaimer: I was sent these products in return for a fair and unbiased review. I've been using the two devices for about a day now, and I've got to say I'm impressed. They're a combination of a vape pen and a hookah pen. I didn't think I'd like it at first, but it's been nice. I've gotten a lot of weird looks from people using it, but that's not a big deal. They both run off of 18650s. The bottom part of the tank is a normal atomizer, and the top is a glass tank for water. The vape that you get from them is cool, it's not overly hot or anything. It isn't a unregulated mod, it still has low voltage protection and a low ohm protection so that's not a big deal. The H-Legend 5 is smaller and seems like something I'd carry around, the H-Legend 3 would have to be something to keep at home, it's pretty big. The H-5 comes in a box with a bunch of extra gaskets and a quick start guide, so it's pretty minimal. The H-3 comes in a nice zippered case with a USB cable, gaskets, a bottle for water, and a brush to clean everything out. I've let a few of my friends try them, and they like them as well. The capacity of the tanks on both are 2ML, and it doesn't seem to burn through juice. No leaks at all. Honestly, I'd recommend them to someone looking for something unique and I'll continue to use them. The H-Legend 5 is here: https://m.alibaba.com/product/60549178888/100-Original-electronic-glass-hookah-pen.html?spm=a2706.7843667.1998817009.1.HnIYKP and the H-Legend 3 can be found on GearBest and EFun. Take a look at them. If you have any questions feel free to ask.