Enhance your LEGO Technic models with this working LEGO Power Function bb0339c01 Tuning Switch. This switch is designed to provide battery-powered power to your LEGO Technic sets and is compatible with the 8869 and 8293 sets. It is perfect for TECHNIC enthusiasts who are looking for a reliable and efficient power source for their LEGO sets. This switch is made by LEGO and is a part of the TECHNIC product line. It connects to a 9V battery power source and is perfect for building toys. It is also compatible with the LEGO Subtheme TECHNIC and the LEGO Theme world TECHNICAL. This switch is a great addition to any LEGO Technic set and will provide a seamless and efficient power source for your models.