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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): 72mm long * 72mm wide * 140mm high Circuit board material: 1.6mm RF-4 double-sided sheet Package includes: 1 x DIY Christmas Tree Kit