Continuous Sweep (Silent Motors) Mini-Quartz Movements (Dials Up to 1/2 in. thick) These new movements have a second hand that moves in a smooth continuous motion, rather than the stepping motion of most quartz movements. This change not only affects the appearance of the clocks you make, but continuous sweep movements also have the added benefit of being more quiet. You will not hear the "clicking" sound every second. Continuous Second Hand Motion 3 Year guarantee and Operates on 1 "AA" cell (not included) American "I" Shaft-Diameter 5/16" Choice Of Three Hand Shaft Lengths