Clock Movements require 1 AA Battery (not included). The movements can also be very quiet. If the constant sound of a clock ticking drives you crazy, just remove the second hand when assembling them into your project! The longer the second is, the louder the ticking will be. Clock: 47923 & 47924 Clock Movement (5/8" thick body) Black Clock Hands (2 sets) Includes optional hanger High Torque Clock: 47950 Clock Movement (5/8" thick body) Black Clock Hands (2 sets) Includes optional hanger Pendulum Clock: 47930 Clock Movement (5/8" thick body) Black Clock Hands (2 sets) Hanger not included. Pendulum hangs 8-1/4" from clock center. Style SurfaceDepth OverallShaft MinHand PendulumLength PriceEach Clock - 47923 3/8" 11/16" 1-3/4" &4-1/4" - $8.49 Clock - 47924 3/4" 1-3/16" 1-3/4" &4-1/4" - $8.49 Clock - 47950 3/4" 1-3/16" 4-3/4" &6-7/8" - $9.49 Pendulum Clock - 47930 3/4" 1-3/16" 1- 3/4" &4-1/4" 8-1/4" $17.99