Kenwood DPX405BT Manual page 63

Upgrades the firmware.
When the firmware version appears, press [Control knob].
"F/W Selecting "YES" and then pressing the [Control knob] starts upgrading the
UPDATE" firmware.
For how to update the firmware, access our web site.
http://www.kenwood.com/cs/ce/
(Colored text: Factory setting)
5. Use the [Control knob] to select a setting.
The previous item appears.
Exit the Function setting mode.
Press and hold the [ ] button.