Specification:    Work Voltage:DC4.5-5V    Power Type:AA*3 battery or USB Cable    Installation Size:60 X 60 X 136mm/2.36 X 2.36 X 5.35inch(L*W*H)    Features:    Great christmas decoration gift, clear instructions and good learning kit    3-color 36pcs LED diode make up the flashing light whe power on makes it looks like a small Christmas tree    All components are marked on the board for placement and polarization, so it’s up to you to find where they go. Make sure you get the resistors in the right place    Very fun Christmas project. Would not be quite difficult for a beginner even you don't have any knowledge of circuits and practice with soldering    The kit comes with all the needed components,the boards, battery compartment, LEDs, capacitors, and transistors. You just need a soldering iron and solder    This circuit is simple and practical, low power consumption.It uses integrated circuits for driving: fewer parts,and the line is simple and easy to understand.    Package Included:    1X 3D Christmas Tree Solder Kit    Instruction :    https://hackaday.io/project/8850/instructions    https://images-na.ssl-images-amazon.com/images/I/A198l3IXCYL.pdf