Compatibility: 40A brushless ESC is compatible with lithium batteries, perfectly matching your accessories, and upgrading the overall performance High quality: made of high-quality metal and electronic component materials, wear-resistant and durable, reliable in use, and provide excellent performance. Comprehensive protection: provide low-voltage cut-off protection, overheat protection and throttle signal loss protection. It also has a certain degree of safety protection, no matter where the throttle stick is, the motor will not rotate after connecting the battery, and it can be operated and used with confidence. : The motor is light in weight and easy to install and use, low noise, good performance and stable operation, which can meet your needs. Application: Very suitable for RC drones, helicopters, etc. A great accessory for rc model airplane lovers. Due to different batches, the appearance, color, and printed words of the product , which does not affect its use Colour:As Shown Material:MetalandPlastic Package Contents: 1 x RC Motor ESC Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.