Honda INSIGHT 2021 Owner's Manual page 182

uuLocking and Unlocking the DoorsuLocking/Unlocking the Doors from the Outside
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Locking/Unlocking the Doors Using a Key
If the lock or unlock button of the remote does not work, use the key instead.
2 Replacing the Button Battery P. 603
Lock
Unlock
* Not available on all models
180
Fully insert the key and turn it.
1Locking/Unlocking the Doors Using a Key
When you lock the driver's door with a key, all the
other doors lock at the same time. When unlocking,
the driver's door unlocks first. Turn the key a second
time within a few seconds to unlock the remaining
doors.
You can customize the door unlock mode setting.
2 Customized Features * P. 158, 372