LIGHTAILING Light Set For (Technic Sian FKP 37) Building Blocks Model - Led Light kit Compatible With Lego 42115(NOT Included The Model)USAGE: The Light Set is used to light up Technic Sian FKP 37 (NOT include the Lego Set). PORDUCT FEATURE: The Light is made use of original material purely handmade. It contains 1 USB Light kit ,Instruction guide, battery box. Plug in power, and light up your building blocks with our amazing design! TIPS: Prepare three AA Batteries, or USB Charger and Voltage should be less than 5V to avoid burning. INSTALLATION INSTRUCTION: The light set installation