devention DEVO-7 User Manual page 167

The max range of stopwatch is from 0 to 59 min 59 sec
B) Countdown setting: press R or L on press the above interface to select
counterdown setting as following;
Press DN on above interface to enter countdown
Press R or L to set countdown. The countdown rang of is from00:05-59:55.
C）usage method
Press UP on " on" interface AN to start on the first time,repress UP to stop; press
DN,timer is the orginal 0
DEVO-7 Page 167 of 170