Description: This is a simple mini Christmas tree DIY kit. Three different PCBs are combined into a 3D stereo Christmas tree model. A variety of different colors can be selected. It can be powered by a button battery and can be free from the power supply. Built-in 7 LED gradient modes plus 7 different Christmas melody. Features: Mini stereo PCB Christmas tree design; 3 different PCB combinations with snowflake patterns; 7 different Christmas songs (see the list of songs for details); 7 kinds of LED gradient effects; The switch powers up automatically to switch between different LED blink modes and different Christmas melody; Can be set to turn music on or off; Powered by two CR2032 coin cell batteries; Available in a variety of colors: color, white, blue, yellow; PCB size: 49mm x 63mm; (Note: The production process is in the description!) Song list: 1, I for wish you a merry Christmas; 2. Santa Claus Is Coming To Town; 3. When a child is born; 4, O Christmas Tree; 5. It Came Upon A Midnight Clear; 6, Joy To The World; 7, Jingle Bells; Function: 1. Load two CR2032 button batteries to supply power; 2. Toggle the power switch to switch to the next mode and the next song; 3. Turn the music switch to turn off or turn on the Christmas music melody; Package included: 1 x Christmas Tree Electronic DIY Kits