Fangrui Product Details 1. 4 Digit Scale, 0-9990 Can Be Set Arbitrarily Upgrade Encoder Adjustment To Avoid Interference From External Factors Such As Temperature And Humidity 2. Soft Start And Soft Stop, Dual Protection For Motor And Power Supply Lower Limit Of Speed, Limiting The Minimum Speed 3. Knob And Button Speed Control, Suitable For People With Different Tactile Sensations Speed Regulation Increment Value, 1, 2, 5, 10, 15, 20, 25, 50, 100 4. Four Startup Modes For More Diverse Handling Power Off Memory Function, Once Set For Long-term Use 5. Digital Display Menu Options, Easy And Fast To Modify Settings Integrated Body For A More Exquisite Appearance. Embedded Encoder Adjustment, Strong Resistance To Dryness, Durability, And Precise Adjustment Wide Voltage Range Adaptation 6-55v Input Voltage:dc 6-55v Display Method:4-digit Digital Tube Speed Regulation Type:current Regulation Control Frequency:15khz Supported Load:dc Brushless Motor Wiring Type:fence Type Terminal Encoder Cap:15x17mm Speed Regulation Method:button+en