NEC VERSA DOCK Manual page 16

A - Keylock switch
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Keylock switch — Provides three settings that let you control NEC
Versa removal. An alarm sounds if someone tries to remove the NEC
Versa while it is locked onto the NEC Versa Dock, even if the NEC
Versa Dock is powered off or is disconnected from AC power.
Note: Motorized docking is only enabled when
the keylock switch is in the full upright position.
Locked – Prevents the NEC Versa from being removed from the NEC
Versa Dock. You must use the key to unlock the unit before removing
the NEC Versa.
Normal – (Default position). Allows you to motorize dock or undock
the NEC Versa. Set the keylock to this position for normal use. To
prevent electrical damage, manual undocking is not allowed when the
keylock is in this state.
Manual – Allows you to remove the NEC Versa by hand. Use the
unlocked position for emergency undocking only. Otherwise, use the
Normal lock setting for normal use and the Locked setting to
physically secure your system to the NEC Versa Dock.
Right side feature
Introducing the NEC Versa Dock 1-9