I've got too many Surfybear units (really, three is too many), so I'm looking to let this one go. As I understand it, it was originally made for the European market, and you can run it with either a 12v or 9v power supply. You can also use an external tank with it. I'm looking for $350. I'll be in Long Beach this Sunday for Winter Surf Fest 2025 if anyone would like to check it out; just PM me. Thanks.