1.    Power down the BooBox 4, then power it back up holding the REC button until the PLY light turns on.
2.    Press buttons “1” and “3” so the 1 and 3 lights turn on, then press REC, the REC light should turn on.
3.    Now press the “1” button, turning the light on if you want write-protection, or off if not.
4.    Press REC twice, both the PLAY and REC lights should turn off.