Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si The governor is a general DC governor with 10-50V voltage. Adopt new field effect power tube/ drive IC/PCB for industrial grade The thickened copper skin and high current balanced PCB layout make the output PWM waveform perfect and more efficient. The product also has small size, wide voltage, high current, low temperature rise, high reliability, adjustable input limit current protection function, 1-4v voltage Signal input function, can match the hand throttle pedal throttle, undervoltage protection and other features. Colour:black Material:plastic+metal Package Contents: 1X Motor Speed Regulator 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.