Speaker Timer by RobertsRules.org

This free speaker timer works for any meeting, speech, debate, or presentation, keeping speakers within their allotted time with clear color cues. The timer turns green at a set countdown time (default is 2 minutes), then yellow (1 minute is the default), then red (and a doorbell rings) when time expires. The yellow tab allows you to change the default times for green and yellow. Great for board meetings, panel discussions, debates, Toastmasters, and classroom presentations, or for running a meeting agenda under Robert's Rules of Order.