Rorliny LED Light Kit for Lego The Rabbit Ranch 21181 Building Kit, Lighting Set Compatible with Lego 21181 (Lights Only, No Lego Models) Warmly Remind: The voltage should be less than 1A 5V to avoid burningAAA Battery and Lego Model are not included in the package. CR2025 or CR2032 is needed to drive the remote control if what you bought is remote control version.When you install the light kit, no over-pulling, bending or over-shaking it to avoid any damageYou don't need to rip apart all the parts. You can cross and hide the wires under the base and make sure the wires lay between the pegs on your bricks. Our Package: Package contains: Light string, connection cable, expansion board, USB cable, battery box etc. Our Lego light kit are delivered in sturdy printed boxes. All lights parts are packed individually in plastic bags to avoid damage and easy to distinguish. Installation Guide: We provide video and image to guide you install the light kit step by step. How to find the installation manual? 1. Find our website which shows on the back of the package box. 2. Enter in the website link and type in the sku shows on the back of the package box. 3. Clike the installation video or images. EASY TO INSTALL Video and images are provided to guide you install the light kit step by step, which will bring you big confidence. After finishing your installation, a big surprise will come together. USB CONNECTION & BATTERY There are two ways to supply the power: USB and Battery. You can connect the USB cable with a power bank, a laptop, an USB-socket or an wall adapter. Or just use battery pack. SAFE & DURABLE The high-grade ABS material and built-in resistance in the light kit can prevent the light from overheating and burning. The material is durable, it can last for years.