Features: 1. Use High-Precision Potentiometers, No Programming Required, 8-Channel Potentiometers And Servos Are Controlled In One-To-One Correspondence; 8-Channel Servos Controller, Suitable For 5V-8.4V Servos Debugging And Testing, Supports Manual Adjustment/Quick Centering/Passing Stream Protection 2. The Onboard And Stable 8-Bit Mcu Is Used To Generate High-Resolution Pwm Signals And Control Accurately. 3. Support Manual Mode And Return-To-Center Mode, Which Can Be Switched Through Function Keys 4. Steering Gear Control Accuracy: 0.09 Degrees (. Pwm Minimum Change Value 1us) 5. Support Control Cycle: 20ms, Pulse Width: 0.5ms-2.5ms; Terminal Block (5V-8.4V) Power Supply Port With Overcurrent Protection Function. Usage 1. Supply Power To The Control Board, The Voltage Is 5v~8.4v, The Specific Voltage Is Subject To The Rated Voltage Of The Actual Servo Used; 2. After Power On, The Led At The Mcu Position Lights Up And Flashes 2 Times In 5 Seconds (Blue Led. 3. Plug The Servo Into The 3pin Servo Interface. + Is The Positive Pole, - Is The Negative Pole, And S Is The Signal Terminal; 4. Turn The Knob And The Servo Will Rotate Synchronously; 5. The Buttons The Knob Can Switch Modes. Press Them Respectively. "Return To Center Mode": One Button To Rotate The Servo Axis To 90 "Manual Mode": The Manual Control Knob Can Rotate The Steering Gear Angle Synchronously Material: PCB Color as shown Package Contents: 1 x Servo Controller Module Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use 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.