This is a DIY calculator KIT soldering module which can perform additions, subtractions, multiplications and divisions.Features:1) It uses through hole components and is easy to solder.2) It does not require a computer; the calculator kit is pre-programmed.3) It is powered by a single CR2032 battery and can be carried anywhere without being tethered.4) It can be turned on instantly, at any time, and is easy to use.5) When not in use for a long time, it will automatically go to sleep mode, saving energy.
This is an excellent beginner building kit designed to teach how solar power is used to drive a small motor. Children use the snap together parts (no tools required) to build six different working models including a helicopter, windmill, plane, airboat, wheeler and robot.