DIANN 2 Sets DC Gearbox Motor TT Motor 200RPM Tire Wheel DC 3-6V 1:48 Male Connector with 1Pc L298N Motor Drive Controller Board

They work and preform to expectations. All four work fine.

Got this to work on my raspberry pi 4 and it worked like a charm! You have to order a separate battery pack for it though.

My kid bought this for a science fair project, it lasted forever and even under water!

Great little motors for powering small science projects. All 4 worked perfectly well with consistent speed and torque characteristics between them.

One of the motors did not work. It is clear that the part was not tested in mfg. Looking further one of the gears in the gearbox was mal-formed so even the assembler did not catch the bad part. Looks like zero quality control. The other motor worked as expected.

Internal gears are plastic and shear easily with little applied torque. Be ready to buy multiple replacements.

1 of the mootors gears was no good