Description: 【Compatibility and Upgrade】: This power upgrade kit is designed for MN128. It offers a significant enhancement in performance for your RC vehicles 【High Performance Motor】: The kit features a universal external rotor motor rated at 2100KV, providing strong power and improved efficiency for your model's propulsion system 【Advanced ESC Features】: The AM32 45A electronic speed controller (ESC) comes equipped with a metal heat sink to enhance cooling efficiency. It includes an integrated BEC module and supports parameter adjustments using the AM32 tuner for optimal performance 【Enhanced Power Dynamics】: Experience Good low speed torque compensation and superior linearity with this upgrade kit. The high speed operating is more aggressive, delivering stronger power output with pre configured sine wave start up and double direction operating capabilities 【Quality Materials and Packaging】: Constructed from quality metal and electronic components, the motor measures 4.7x2.8x2.8 cm while the ESC measures 3.8x2.2x1.4 cm. The package includes 1 brushless ESC and 1 motor to complete your upgrade needs efficiently Specification: Material: Metal, Electronic components   Size Chart: Motor: 4.7cmx2.8cmx2.8cm/1.85inchx1.10inchx1.10inch ESC: 3.8cmx2.2cmx1.4cm/1.50inchx0.87inchx0.55inch Package Includes: 1 RC Car Motor 1 Electric Speed Controller