This 99.5:1 ratio gear motor runs at a no-load speed of 60 RPM when 12VDC is applied. Mounted to the back of the Modern Robotics/MATRIX 12VDC Motor driving its gearbox is a quadrature encoder able to run on both 3.3V and 5V. Its bullet connectors are a reliable connection style that allows you to easily reverse polarity to the motor and pass its wires through 14mm holes in goBILDA® channel, even when grommets are installed.