Quartz Accuracy - Stabilized quartz crystal assures high accuracy to within ±15 seconds per month. Reliability - A minimum number of parts (17 in entire motor) reduces wear within the motor and assures trouble-free operation. The motor is completely enclosed in its case, so dust and dirt cannot get into the motor. Compact Size - The motor is approximately 2 1/8” x 2 1/8” x 1/2” The motor runs approximately two years on a fresh “AA” battery, not included. Step Second Motion - The second hand, if used, moves in exact one second steps. SKP Mini Quartz Clock Movement Kit The movement case is approximately 2 1/8”x 2 1/8” x 1/2” Capable of using hands up to 6 inches in length. Uses AA battery. Not included. Kit Includes: Movement, a pair of black spade 2 1/2 miute hands and hour hand, a red 2 3/4 second hand, and mounting hardware Shaft Sizes: 5/8 (16mm) Size 5/8 (16mm) Color Black Theme Plain Room Type Living Room Brand Name Generic Style Name Modern Alarm Clock No Item Weight 4 ounces Display Type Analog Manufacturer SKP Model Number CM-120 Power Source Battery Powered Item Type Name Quartz Movement Operation Mode Electrical Watch Movement Quartz Number of Items 1 Additional Features Adjustable Brightness Number of Batteries 1 AA batteries required. Indoor Outdoor Usage Indoor Item Dimensions W x H 2.25 W x 2.25 H Batteries are Included No Manufacturer Part Number 28507v