【Fun DIY Solder Kit】：3D Christmas tree, 7-color fun kit. After the assembly is completed, it will become a beautiful colorful LED flashing Christmas tree. It is very helpful in improving your hands-on ability and soldering skills for Stem Students and at the same time you learn basic electronic knowledge and circuit principles | 【Easy to Assembly】: make it assembly easy for beginners and DIY lovers as clearly mapped and marked connections on the circuit board. Need carefulness and patience when you are installing 36pcs RGB LEDs | 【Product parameter】：Working voltage: 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,Not include battery).Dimensions: 60mm length *60mm width *136mm height. | 【Nice Gift and Decoration】: You will see a colorful LED Christmas tree (more beautiful at night).nice gift for friends/family/DIY Lovers/soldering fans. beautiful decoration at home on holidays and festivals like Christmas | 【Package list】: 3 x Circuit Board,1 x Battery Box,1 x USB Cable,1 bag x Resistors ,Diodes and Other Accessories. | 【Service】: If you encounter any problems during use, please contact us, we will reply within 24 hours