iHaospace DIY Soldering Practice, 3D Christmas Tree Electronic Assemble Kit, Circuit Solder STEM Project for Student Teens(7 Colors)

3D Christmas tree DIY soldering kIt is designed to improve users' @@@ijqCZ5ZY3hHCs5P1mrIIfmD/68EpRVLA@@@ knowledge and soldering skills. It is perfect for school basic electronics projects, ASP(After School Program) and STEM education. You will need a set of soldering tools(not included in the product) such as electric iron, solder wire and so on, to finish the assemble and soldering process. The solder practice kit will become a beautiful flashing Xmas tree when assemble complete. 36pcs 7-color LED diodes will make a bright, colorful and wonderful light at night. Not only for practice, the tree can also be a creative gift and nice decoration, especially in Christmas. DC 4.5V-5V working voltage can be powered by 3 x AA batteries or USB power adapter directly (Comes with the battery holder and USB cable). Size of the finished tree: 60x60x136mm/2.36"x2.36"x5.35" (L*W*H), weight 60(g)/0.14(lbs) DC 4.5V-5V working voltage can be powered by 3 x AA batteries or USB power adapter directly (Comes with the battery holder and USB cable). Size of the finished tree: 60x60x136mm/2.36"x2.36"x5.35" (L*W*H), weight 60(g)/0.14(lbs) If some leds don't light, please make sure all components are in right direction and correct place. Please check if there are some solder points are in poor connection, which is very important when testing. Welcome to contact our service team if you have any question. We appreciate every purchase.