BO Motors are Battery Operated Motors. They work just fine in a voltage range from 7V to 12V. In this project, we will be using it to run slow at 3.7 to 4V since the application needs comparatively lower speeds. They are lower in cost compared to the geared motors but they are lower in power as well. They provide lesser torque than the geared motors and are available in a range of 100rpm to 300rpm.