Features: 300A brushless Remote Control ESC suitable for MAX4 1/5 Scale External Programming Port: Easy to connect to it when setting the ESC The waterproof ESC offers all weather durability. Provide unparalleled control and power for serious remote controlled action. Suitable for hobbyists, competitive Remote Control racers, and enthusiasts looking for upgrades, this set is engineered to provide unparalleled control and power for serious remote controlled action. Specifications: Component: Metal Size: Approx.125mm/4.92inch Type: MAX4 HV 300A 6-12S; 70125SD 560KV 8-12S Package Includes: 1x Electric Speed Controller or 1x Brushless Motor or 1x Electric Speed Controller 1x Brushless Motor note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.