Feature: FUNCTION: Pulse width modulation (PWM) is used to provide stable speed control with high torque at low speeds. NOTICE: This is a DC brush motor controller; do not use with AC motors. WIDE USE: Suitable for industrial DC motor speed regulation, DC fans, and similar applications. EASY TO USE: Features a reliable speed control mode with stable performance, adjustable speed, and simple installation. Specification: Supply Voltage: DC 9V-60V Installation Method: Panel mount, wiring as per diagram Color: Black Material: Metal + Plastic Size: Approx. 99*60*90mm Package Contents: 1 x 10A PWM Motor Speed Controller Note: Light shooting and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement error allowed is +/- 1-3cm.