Features: This controller input AC220V, Armature port DC 0v-220v Cooperate with potentiometer, stepless adjustable freely.Applicable to permanent magnet 2 wire motor and excitation 4 wire DC motor. Suitable for industrial machinery and equipment, diy enthusiasts. This motor controller board features stepless adjustable, linear stability, slight noise.Can be used widely in garment textile equipment, gluing machine, conveying hot stamping machine, bag making machine production line equipment, printing machine,roller conveyor, polishing machine, grinding machine, milling machine, woodworking machinery, automatic welding equipment, mixer, etc. DC motorspeed control device. Specifications: Model: LY - 820 Scope of application: DC excitation, permanent magnet, series excitation, motor motor Input voltage: AC 220V Output voltage: DC 0v-220v Motor power: 0-750w Size:125 x 103 x 48mm/4.92 x 4.05 x 1.88inchWeight: 450g Wiring: Package Included: 1 x Motor Controller Board .