The DS1550SR V3 SRS features a brushless system that delivers unparalleled performance and efficiency. It supports SSR (Super Response) mode, which gives you the fastest response speed possible. It also has a hybrid titanium/steel internal gear set, which enhances durability and smoothness. The servo comes in a complete alloy case, which provides excellent heat dissipation and protection. The servo is programmable with a program card (sold separately), which allows you to customize various settings such as end point, dead band, direction, and speed. The servo supports 2cell LiPo up to 8.4V, which gives you more power and longer run time. The servo has a low profile design, which makes it easy to fit in any RC car chassis. The Digital Brushless Servo V3 is the best choice for your RC car, whether you are racing or bashing.