Use: the light set is used for the Lego 42141 Technic McLaren Formula 1 (Lego set not included). Product features: the light is handmade from original parts. It contains 1 USB light set, battery compartment. Simply plug in and your building blocks light up thanks to our wonderful design! Tips: Three AA batteries or USB charging cable are used for power supply, voltage should be below 5V to avoid overheating and fire. Installation instructions: attach the lights according to your wishes. Please install the LED lights carefully, do not pull tightly, do not bend or shake. About us: We specialize in custom light sets, and want to provide good products and service to our customers. Make your creations unique, use your imagination and creativity. Let us light up your building blocks and breathe new life into them. If you have any problems, please let us know. Have fun shopping! › See more product details Model: Formula 1 Size: Color: Orange