Age Mark: 8+ Brick Type: LEGO® System and LEGO® Technic Related Products: 9688 Piece Count: 1
The E-Motor is a 9V motor with an internal gearbox. Its 9.5:1 gearing ratio provides a maximum torque of 4.5 Ncm and approximately 800 rotations per minute without load. It also functions as a very efficient generator.