Figured I'd take a minute to do my due diligence to you guys and give you what info I do have on a couple of products. The Zema 3-in-1 pro is a pen vaporizer that is advertised to use concentrates, liquids, and dry herbs. I purchased it from gotvape.com because other friends and my self have made multiple purchases from them in the past and I got the pen on the 4th of july sale for like $50 something shipped. http://www.gotvape.net/zema-pro-3-in1-vaporizer.html Dry chamber has horrible resistance and doesn't hit for shit. When it does it's the worst tasting combustion of your life. Concentrate chamber- Worked fine, for a couple of days. literally think it worked 3 total days. Called to see about that and they said it's just a consumable part that I would have to purchase more. Even the manufacturer told me the same. Liquid tank- The liquid tank was the only thing that worked well on this unit. Though it had a bad seal that would seep a little and also leak to the battery. The battery is a cheap crap small like 600mA battery. Do not purchase!!!! Just a waste of time and money.