Note: This only applies to units made in 2018. Newer units do not feature a safety key.
The safety key is located inside the battery compartment. When facing the unit, open the battery door and you will find the black colored safety key on the right side. The safety key must be plugged in for the iON18SB to operate. Please note that the lights and chute will function without the key, however the auger will not engage for safety reasons.