ITEM NAME:60V PWM Digital Display Tachometer DC Motor Drive Module Speed Controller #gib Product Description Description: Specification: Input voltage: DC6-60V Output voltage: linear under load Output current: 0-30A Continuous current: 20A Speed control type: flow adjustment Speed control mode: potentiometer Speed range: 0--100% Control frequency: 15KHZ Wiring type: fence terminal block Knob line length: 15cm Module size: 75x56x28mm/0.25x0.18x0.09in Net weight of packaging: 72 grams Note: The digital display is the percentage non-motor actual speed. Included: 1 X PWM DC Motor Speed Controller.Module size: 75x56x28mm/0.25x0.18x0.09in. Speed range: 0--100%. Knob line length: 15cm. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.