A typical chinese yellow plastic gear motor.
These are extremely common lots of projects use them, cheap as chips and get the job done for your little inventions.
Voltage is 3 to 6v, current is 150 to 200mA, the gearing ratio is 1:48
The axle on both sides turn the same direction if you were wondering, so you can put wheels on both sides and it will drive straight ahead/reverse depending on polarity, for a simple toy car for example.
If you need something with higher torque then see the blue gear motor with all-metal gears.
