To use this Avitech MCC - 8001U Image Scaler / Processor, first connect it to the correct power supply. It will then be ready to start scaling and processing images. During use, keep in mind that the fan is louder than normal, which is a known feature of this product. For maintenance, regularly check the power supply to make sure it's working properly. Also, clean the device gently with a soft cloth to keep it in good condition.