Presentation Timer with Red-yellow-green Stop Lights Easy to use Count Up elapsed timer Count Down time remaining timer Green, yellow, and red warning indicators have preprogrammed settings to match Toastmaster requirements or may be programmed by the user Beeper provides audible sound when the timer reaches zero. Built in time of day clock 4-digit LED 7-segment display with 0.56" (14.22mm) high digits Connects 2 or more TimeKeepers together where one becomes the timer and the others become remote displays. Count Down timer settable to minutes 0 to 99 minutes. Two serial data RJ11 connectors for accessories. Ruggedized aluminum construction. Display Construction: ABS plastic enclosure, black finish. Timer Construction: Metal enclosure with black powder-coated finish.