Headtrauma89

Ok first of all I was given (for free) a 6.5'x6.5' hot tub. It has been sitting and neglecting for over a year. There are no brand tags or model numbers. It needs cleaned and some plumbing fixed underneath. My questions are, how can I tell if it's a 110v , 220 or 240v? It has a regular 3prong plug in , 1.5 HP pump but the heating element says rated for 240v. But also has a high and low light. I'm not sure if that means it can take up to 240v or if it's required. I've read somewhere that the 1.5hp pump indicated 110v plug and play? I'm not sure how to upload pictures, every time I try it say too big