... function with 3 digit LED display, and thumb swtich for setting timing value. Our HM4 product is 72Hx72W mm ... 99.9H;3) With software menu for setting different function, including timing unit selection (hour, minute, second), output mode selection (3 modes), output ... to different timing requirement;5) With external Reset, Pause connection for easy manual control;6) Power supply: HM4: 220VAC, HM6 / ...