River City Clocks Radio-controlled Schoolhouse Clock with Swinging Pendulum and Oak Finish - 21 Inches Tall - Model # 801-403O Radio-controlled analog wall clock is highly accurate Automatically adjusts for daylight savings Pendulum shows through glass window Alder-wood case measures 21 by 13 by 3-1/2 inches Runs on 1 AA battery, requires another for the pendulum