My pro 82 keypad is locked. How do you unlock it?

To turn on the keylock, hold down key
for about 3 seconds until the
scanner beeps three times and
appears. To turn it off, hold
down key for about 3 seconds
until the scanner beeps three
times and the key disappears

For Future refernce you can go here

http://support.radioshack.com/support_tutorials/communications/20-315.htm

and click on user manual