Description: 51 Microcontroller Teaching Experiment Welding Practice DIY Parts: Ensure stable performance and long service life. Supports Type-c or button battery power supply. Convert resistance value of color ring resistors for versatile electronic practice Homemade Calculator: DIY kit for electronic enthusiasts to practice welding and learn. Supports Type-c DC5V or button battery power supply. Perform addition, subtraction, multiplication, and division calculations with ease Teaching Training Experiment Electronic DIY Welding Practice Parts: Multi-functional kit for electronic enthusiasts. Convert resistance value of color ring resistors. Support Type-c power interface DC5V or button battery power supply Electronic Production Kit: for electronic enthusiasts to practice welding and learn. Supports Type-c DC5V or button battery power supply. Perform addition, subtraction, multiplication, and division calculations effortlessly Calculator Kit: DIY electronic kit for practicing welding and learning. Support Type-c power interface DC5V or button battery power supply. Convert resistance value of color ring resistors for versatile use Specification: Color: As Shown. Material: PCB. Size: Approx 11.9*8.5*1.6CM/4.69*3.35*0.63inch. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Includes: 1* Calculator set parts