Trigger clock movement details Movement modle:HR1688ST-15 Movement size:56*56*16.5mm Qty/ctn:500pcs Carton size:40*36*38.5cm Certificate:CE ROHS Clock movement rystal frequency: 32.768 KHz Average time keeping :±1sec/ day at 1.5V,24℃ New weight:25g Battery: AA / 1 Battery life:approx 1 year Shaft length:7mm/8mm/9mm/11mm/13mm/15mm/17mm/20mm/23mm.