The Wrench

Ok, so i bought a house and there was a spa in the back yard. ive never owned a spa and dont really know too much about them other than rappers seem to like them a lot in their videos. Aside from some assorted chemicals in the kitchen closet, there was no material on the spa. i dont have a manual, purchase info, model number, nothing. i took some pics in hopes someone could identify it and point me in the right direction to find a manual. hell, i dont even know how to turn the thing on.