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Introduce: Christmas tree kit consists of three circuit boards, you need to soldering it by yourself, so 36 LEDs flash alternately, showing a three-dimensional outline of a Christmas tree in the space. (the night environment has better viewing). Instruction: Click to open This is a DIY kit, you need to assembly it. Feature: Model: Coloful light Operating voltage: DC4.5-5V Power supply: 3 AA batteries (not includes) cell phone chargers, computers, power bank Dimensions (including housing): 15.4*11.5*11.5cm (H*L*W) Circuit board material: 1.6mm RF-4 double-sided sheet LED lights: 53 pcs RGB LED Function: with MP3 player, can read TF memory card, read U disk, chassis with 2W power amplifier + 3W speakers. Package includes: 1 x DIY Music Christmas Tree Kit