Owner's Manual
Page 9
...both MODE/Power and MARK to select imperial or metric units for longer distances. It will automatically switch from "yd" to "m". When the BackTrack is turned back on the display backlight at the same time when any Location Mode PUSH PUSH QUICK PRESS both the MARK and MODE/Power... buttons at anytime. The BackTrack will automatically turn off manually. It can display up a maximum distance of the three location icons are selected the distance units display changes from yards to miles...
...both MODE/Power and MARK to select imperial or metric units for longer distances. It will automatically switch from "yd" to "m". When the BackTrack is turned back on the display backlight at the same time when any Location Mode PUSH PUSH QUICK PRESS both the MARK and MODE/Power... buttons at anytime. The BackTrack will automatically turn off manually. It can display up a maximum distance of the three location icons are selected the distance units display changes from yards to miles...