1. Device Overview
①
③
④
②
⑤
①
Power and Backlight
Hold to turn the device on/off.
Press to turn the backlight on/off.
②
Back/Lap
Press to return to the previous page or step.
Switch time display mode.
③
Up
Press to scroll up the menus.
④
OK and Enter
Press to accept an entry or to move forward on a menu.
⑤
Down
Press to scroll down the menus.
2.