Excellent Material: The motor controller is made of PCB board with excellent performance. Motor controller is small in size and light in weight so it can be easily brought to any place for use. Fine Replacement: Professional motor driver chip imported low conductivity resistance switch. When your old controller is broken the motor controller is the choice for fine replacement. Adjustable: The motor controller is designed with 2 different modes that can be adjusted as needed. No need to use small volume heat sink ideal for saving battery energy. Reliable: The control module is designed and produced with high requirements and tested many times during the production process which is a good choice. Built-in overheat protection circuit no need to be afraid of motor scalding and it automatically recovers when the temperature drops. Customer Service: If you confront any problems about our products please feel free to contact us we are ready to help. We will solve your problems as soon as possible. Specification: Material: PCB Board Supply Voltage: 2V-10V Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. includes: 1Mdul Stepper Motor Driver