Diann 4pcs TT Motor DC 3-6V Gearbox Motor 200RPM Ratio 1:48 Shaft Motor with 2.54mm Wire for DIY Smart Car Robot

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

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

Todo correcto, funcionaron adecuadamente

So far so good, I just needed 2 of them. The only problem I had was that I got a defective one.

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.

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.

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

not good gear slipping