Clarion RDB245D - owners manual

This is from the 225 but should be the same:

Setting the Clock
1) Press and hold the BND button 0, and then
press the DISP button 9 to display the clock
display.
2) Press and hold the BND button 0, and then
press the DISP button 9 for 2 seconds or
longer.
3) Press the SRCH Up button ´, then set the
current hour.
4) Press the SRCH Down button ´, then set
the current minute.
5) Press the BND button 0, then the clock is
set.
Notes:
• If you select another operation mode while you are
setting the clock, the clock setting operation will be
canceled.
• If you remove the vehicle’s battery for a check or
repair, the clock will be reset, so you must set it again