1. Soft start and soft stop, dual protection for motor and power supply. Lower limit of speed, limit minimum speed, and reduce minimum space for starting 2. 0-9990 four digit digital tube, scale percentage meter, dual use analog tachometer, 9-item speed adjustment increment value, fine adjustment, fast adjustment 3. Multiple startup modes, more diverse handling, and more versatile use. Power off memory function, one-time setting, long-term use 4. Forward stop and reverse three gears, forward rotation and reverse rotation, arbitrary switching Supports dual speed, different directions, and different rotational speeds. Digital display menu options are intuitive and easy to understand, and setting modifications are convenient and fast 5. Embedded knob switch, integrated body, more exquisite appearance. Knob+button speed regulation, 360 degree mechanical feel knob, membrane button. Wide voltage range, suitable for 6-55V, wider application range for motors 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 Forward and reverse:bidirectional Installation method:embedded Set the number of functions:7 Speed regulation method:button and knob Maximum current:20A(has forward and reverse functions) Colour:Blue & Black Material:Plastic Size:77mm x 57mm x 38mm, Opening size:72mm x 52mm Package Contents: 1 * Governor 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.