Features: The onboards MCU is used to generate high-resolution PWM signal with precise control; Support manual modes and return modes, switching by button, with modes indicator; Support knob adjustment control or serial port command control in manual modes; Steering gear control accuracy: 0.09degrees (that is, the minimum change value of PWM is 1us); Supports servo with a control period of 20ms and a pulse width of 0.5-2.5ms; You can directly use the 2second battery charging head to debugging and return the steering gear; Power supply voltages ranges: 5-9V (depending on the actual power supply voltages of the servo used); Specifications: Component:ABS Size:Approx.100x55mm/3.93x2.16inch Package Includes: 1pc 8 Channel Servo Controller Debugging Board note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.