Features： 1、Controller shell is made of high quality metal with notch design, which can be used for a long time. 2、Heat dissipation function is good, which can protect the internal circuit and avoid thermal overload. 3、Brushless motor controller can provide stable speed and sensitive control of braking and direction changes. 4、ABS shell is strong and wear resistant, and can be used normally at temperatures from ‑20 DegreeC to 60 DegreeC. The LCD electric display instrument is small in size and light in weight. 5、The wires and interfaces of the brushless motor controller are sturdy and durable, high temperature resistant wiring, easy to install, and safe to use. Specification： Item Type: Brushless Motor Controller Material: Aluminum Alloy, ABS Controller Box Size: Approx. 12 x 8.5 x 4.5cm / 4.7 x 3.3 x 1.8in Power: 450W/500W General Current: Current Limit 23A Package List： 1 x Controller 1 x Display 1 x User Manual