To use this LYRA 5 - string electric violin, first, get a 2032 battery as it's not included with the product. Open the battery compartment and insert the battery. Remember, the battery cap is missing, so handle it carefully to avoid the battery falling out. When you're done playing, put the violin in the included case to protect it from scratches and damage. Store the violin in a dry and cool place to keep it in good condition. Regularly check the strings for any signs of wear and replace them if needed.