ITEM NAME:DC To 30V Adjustable Speed Motor Controller Stable Digital Display High Power Description: Material: Made with durable circuit board which can be used for a long time. Digital Display: LCD screen with backlight, can display working time, percentage of rotation speed, current mode Duty Cycle: duty cycle upper and lower limits and working frequency can be set to operate and use motors conveniently. Adjustable Speed: Digital encoder knob adjusts motor speed, which is more accurate and consistent. Stable: This simple and easy-to-use DC motor speed controller has an stable performance. &;nbsp; Specification: Model: ZK- Type: Motor Speed Controller Color: As shown Working voltage: DC 5-30V Rated current: 5A (maximum current 15A) Maximum power: 150W Working frequency: 1KHz to 99KHz adjustable Duty cycle: 0-100%, 1% step Size(L x W x H): 79 x 43 x 26 mm &;nbsp; Package included: 1pc x Motor Speed Controller &;nbsp; Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-3cm differences due to manual measurement..Duty Cycle: duty cycle upper and lower limits and working frequency can be set to operate and use motors conveniently. Adjustable Speed: Digital encoder knob adjusts motor speed, which is more accurate and consistent.