Hense Regulator Mechanical Wind-Up Mantel Chime Clocks,For Living Room Decorative Solid Wood Clocks Device HD326 Chimes on the hour, it will rings once on each hour. High-end rosewood and basswood contrasting shelf,shows your noble taste It will works about two weeks once you wind it up one time. Measures 9 inches (width) * 14 inches (heigth) * 6 inches (depth) Mechanical Manual wind-up operate,no battery needed.