If your handheld radio is not operating properly, the following describes how to reset the radio to factory settings.

MR HH90, MR HH100, MR HH200

Hold both the MODE button and the WX/UIC button, then power on. Continue holding the buttons until the display test is done.

MR HH125, MR HH150

Hold both the DW button and the MEM/ESC button, then power on. Continue holding the buttons until the display test is done. The display should show “IN”. Power off & back on.

MR HH300, MR HH400

Hold both the WX/UIC button and the HI/LO button, then power on. Continue holding the buttons for a few seconds, then release.

MR HH325, MR HH330, MR HH350, MR HH425, MR HH450, MR HH475, MR HH500

Hold both the H-M-L button and the Tri-Watch button, then power on. Continue holding the buttons until the display test is done.

MRHH600 

Power OFF the MRHH600. Press and Hold the Rewind, Channel Down and Left most function (below the LCD – first button going left to right) buttons and turn the radio on. From the FACTORY MODE screen, select “FACTORY RESET” and follow the prompts.