1This Motor PWM Speed Controller adopts with screw terminals easy Installation.2Input Voltage Range: DC 6V-DC 60V. supply:12V 24V 36V 48VOutput Current: 0-30A(Can not input 220V and 110V household electricity).3LED Display Design which shows percentage rate of actual speed to maximum speed, so the data is readable through the LED display, you can get a precise data easily,but input voltage should be equal to the rated voltage of the DC motor 6-60V.4speed controller size:13x6x32cm/51 Inch x 24 Inch x 12 Inch (l*w*h).button switch size:4x18cm/15 Inch x 069Inch (h*w).potentiometer size: 23 x 20mm /09Inch x077Inch (h*w). knob size:155x235mm/06 Inchx1 Inch(h*w),Inner hole size:6mm.5It is equipped with a momentary start/stop switch and a speed control potentiometer and knob,you can regulator Stepless Variable through the potentiometer to provide a better and stable performance.Speed control type:speed control mode: potentiometerSpeed range: 0--100%Control frequency: 15KHZWiring type: fence terminal knobLength: 18CMProduct net income: 120 gramsPanel openings: L x W 92mm x 56mmSpeed Digital: Percentage 0-100Colour:As shownMaterial:ABSSize:95 x 60 x 338mmPackage Contents:1 * speed controller1 * momentary start/stop switch1 * potentiometer1 * knobNote:1Digital display is a percentage of non-motor actual speed2The input voltage must be positive and negative3Can not input 220V household electricity4The input voltage should be equal to the rated voltage of the motor (within 6-60V). Such as motor rated voltage 12 input 12V motor 36V input 36VOnly the above package content, other products are not included.Note: Light 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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 25 hours Hope you have a pleasant shopping experience!