Material: This controller is made of metal, which can ensure reliable performance and long service life. Prefect Size: This controller is small and lightweight, so it is convenient for you to use and it will not cover too much space. Simple Installation: The design of this controller is simple and clear, so the installation of it is simple and convenient. High Fit: The controller can fit the original elements well, so the device can work well after its installation. Easy Care: This controller is wearable and reusable, so you do not need to spend much time and energy to keep it. Specification: Color: As shown. Material: Metal. Size: Approx 3x2.6x1.4cm/1.18x1.02x0.55inch. Operating voltage: DC4.5V-28V Output current: 0-5A. Output power: 90W(large). Static current: 7u A (standby state). PWM duty cycle: 1%-100%. PWM frequency: 20khz. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Speed Controller.