Hall Research U2-160 - Manual (Page 7)

USB 2.0 Cat6 Extender
5 5
Using the Multi Country Power Adapter
Identify the plug that you need for your country. Insert the required
plug into the adapter. The plugs are keyed to avoid Incorrect
Insertion. Push the plug firmly towards the housing, twist and allow
the latch on the adapter to click into place. To remove, push the
button marked and twist in the opposite direction.
Make sure the plug is locked firmly in place before use!
CAUTION!
Keep out of reach of children
NEVER insert just the plug by itself into AC mains