DIY Soldering Project Game Kit Retro Classic Electronic Soldering Kit with 5 Retro Classic Games and Acrylic Case, Idea for STEM High School Family Education Friends by Etoput
mini USB 5V power with the dot matrix of 16*8, STC chip high speed and high speed. All copper mini USB, 3 bit mini digital tube
New PDF and paper english soldering guide, guide the soldering steps for each component, and the welding sequence of components needs to follow from low to high