Castle Creations Mamba XLX2 33.6V Brushless ESC Regulator Pre-owned. I personally could not use it because I don't have an engine strong enough to push it, and I can't afford to upgrade my car so I'm going to let it go for 0 with the hookups I have in the picture. A paid 0 as is, and I have no runs with it. Pluse, I put my continuity tester on it. So I got 1.9 V out of the A,B,C, ports if that helps.