Diameter of 40 MM Round clock movements Small circular movement size:diameter 40 * 8 mm in Movement net weight:8g Super-thin small circular movement The use of working time of 6 ~ 8 years The above,All through the CE, ROHS quality certification, movement rystal frequency: 32.768 KHz Average time keeping :±1sec/ day at 1.5V,24℃ Small circular movement packaging quantity: 1000 / box, 8.4 kg Carton packaging specifications: 39 * 29.3 * 24.8 cm Super-thin small circular movement operating voltage: 1.3 V to 1.7 V Battery specifications/life: a LR44 / one year Small circular movement the average power consumption current: 25 uA (save electricity 20%)