Men's Robot Style Zinc Alloy Band Digital Electronic Watch - Black Grey (1 x CR2032)
Function button is on the left side; First layer is 1~12 hour display; Second layer is minute display(Binary display: 10~50 1~9). - Time adjustment: press the function button will show the hour time; When hour LED indicator flash press the function button 5s can adjust hour time by function button; Press the function button for another 5s can adjust the minute time; After finishing adjustment long press the button will return normal display mode.