Specifications: It has digital 0-100 percentage table precision bit set and jog stop switch. Features 6-60V wide voltage 30A. The input voltage must be positive and negative. Can not input 220V household electricity. The input voltage should be equal to the rated voltage of the motor (within 6-60V). Item Name: Button Speed Controller Material: ABS Output Voltage: Linear Under Load Output Current: 0-30A Continuous Current: within 20A Speed Regulation Type: Flow Regulation Speed Regulation Mode: Jog+- Speed Range: 0-100 Percentage Control Frequency: 21KHZ Wiring Type: Barrier Terminal Block Support Motor: Brush Motor Speed Digital Display: Percentage 0-100 Features: Durable, Useful, Easy to Install Panel Opening Size: 9.2cm x 5.6cm/3.62" x 2.2" (Approx.) Module Size: 9.6cm x 6.1cm x 3.4cm/3.78" x 2.4" x 1.34" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Included: 1 x Button Speed Controller