These motorized trimmers include a speed adjustment dial, built in motor, and power cord. No electricity. The Clear Top Trimmer can also be operated with the standard hand crank with no modifications. These motorized trimmers include a speed adjustment dial, built in motor, and power cord. No electricity. The Clear Top Trimmer can also be operated with the standard hand crank with no modifications or serious changes to the trimmer. Clear upper bowl allows you to see your product while it is working. Available in 16", 18", and 24" diameters.