[Al Skierkiewicz]

Both replies are correct in this respect...
The rules allow you to design any type of operator interface within the guidelines that the digital outputs can be used to drive LEDs but are current limited to 10ma each. 10ma is capable of lighting a single LED but just barely and you only have five volts available when the ouptput is "high". If your Sonalert fits that criteria, 5volts @10ma max you might be good to go. FIRST has limited sound at competitions and may frown on sounder devices in the player station. Finally, if you are a rookie team, I can tell you from years of experience that a sounder will have to be really loud to hear over the roar of the crowd.
Good Luck All,