Retekess TR640 - Page 14

4.8 Sleep Time Settings
Choose the icon of , and press【ENTER】to enter sleep time (auto shutdown time) setting
mode.
After setting, the LCD screen displays the sleep symbol of “ ” and the countdown of shutdown.
※: Automatically shut down within the set automatic sleep shutdown time, and then LCD sleep
symbol of “ ” disappears.
4.9 Operation Introduction of Settings
Choose the icon of ，and press【ENTER】to enter system settings, as shown in the following
pictures:
off
off
15minutes
Rotate【 】to choose, and press ENTER to confirm.
30minutes
Rotate【 】to choose, and press ENTER to confirm.
45minutes
Rotate【 】to choose, and press ENTER to confirm.
60minutes
Rotate【 】to choose, and press ENTER to confirm.
90minutes
Rotate【 】to choose, and press ENTER to confirm.
120minutes
Rotate【 】to choose, and press ENTER to confirm.
150minutes
Rotate【 】to choose, and press ENTER to confirm.
180minutes
Rotate【 】to choose, and press ENTER to confirm.