Material: plastic + metal Size: about 3.1 * 3 cm/ 1.2 * 1.1 inches Voltage range: 1.8V-12V Board size: approx. 3.2 * 3.2 cm/ 1.2 * 1.2 inch Max. Current: 2A Note: This item, the electrical machine can not afford the continuous current more than 0.5 A, such as 755 electric machines and children's carobile. The motor speed controller is equipped with a self recovery fuse 2A and a power-on LED light. It can easily have a continuous current of 2A to your DC motor or other DC load. With the recovery backup (will automatically disconnect the automatic recovery after cooling, when the current becomes too large.) Delivery: 1 x motor speed controller Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.