1. NO MODEL BUILDING SETONLY THE LIGHT KIT FOR SALE, MODEL NOT INCLUDED. This LIGHTING KIT is specially compatible with LEGO Super Santa's Post Office 10339. MODELS SET Need to be Purchased Separately or Already Owned by Yourselves. (Note: Please click on the 4Port Expansion Board to order it together.) 2. LIGHT UP YOUR BLOCKSLight up corners of the model with gleam, intense lights, you can see the vivid details inside and outside, lights compatible with LEGO Santa's Post Office 10339 make blocks glow in the dark. A special arrangement for Fans Family collections. 3. STEPBYSTEP INSTALLATIONProvide detailed video/PDF installation instructions(Online) and stepbystep numbered light bags. Just disassemble a few bricks to install the light fixtures! Parts small and not fragile, DON'T pull wires too hard. 4. MULTIPLE PLAY Light kit Compatible with LEGO Santa's Post Office 10339 set can be powered by USB (Voltage less than 5V). The lights will be brighter when powered by USB. Please test each light part before assembling.