This 633MCW high voltage coreless steel gear servo is perfect for scale crawlers, 1/8 1/10 monster truck, 1/8 1/10 2WD and 4WD buggies, as well as 1/8 scale buggies and trucks. In addition, this servo is great choice for boats and other applications which require high power, high voltage and waterproof. Waterproof IP67 level up to 1 meter which allow driving in the rain, puddles, snow and mud. Highly reliable and durable patent gear design. Full metal case for fast heat disipation. High precision digital control circuitry.