Three independent channels count down with simultaneous LCD display, time-out and 60-second audible alarm. Channels may be started independently or simultaneously. Count down from 20 hours; timer automatically counts up after count-down reaches zero to show time elapsed since alarm. Memory recalls previous interval settings. Alternately displays clock and stopwatch (to 1/100 sec.) Magnetic back allows mounting on metal surfaces. Includes two-year battery. Measures 64 x 86 x 22mm.