The LD02 square gear motor operates at 3 volts with 130 deceleration motor box.
Specifications:
Length: 4.5cm
Width: 4.5cm
Height: 2.0cm
Voltage: 3V
Speed: 20 rpm / min
Axis: 3.5cm
Shaft diameter: 2.5mm, at the end with a square plastic shaft (plastic end of the top hole can be used with M2 screws)
Plastic square shaft size: 4 * 4mm
Random color delivery.