WORK ON YOUR SOLDERING SKILLS: 3D DIY soldering kit is designed for people OVER 15 years old, aimed at improving users' electronics knowledge and soldering skills. It is perfect for 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. RGB LED LIGHTS: The solder practice kit will become a beautiful flashing Xmas tree when assemble complete. 36PCS RGB LED diodes will make a bright, colorful and wonderful light at night. Not only for practice, the tree can also be a gift and nice decoration, especially in Christmas. POWER MODE: 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). CLEAR MARK: The components name are well marked on the PCB board so you can find where the component should place. CAREFULLY CHECK: If some don' 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. TIP: Self-prepared 3 AAA batteries size: 6x6 x 13.6cm Material: plastic colour: As shown Package Contents: 1 SET x Christmas Trees Soldering Project(1 set 64 accessories as shown in the figure) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.