This timer is unique in two respects; it is the only multi-channel timer on which various channels can be set independently but started simultaneously. It also has the loudest alarm we have heard on a timer. 4 channels count either up or down to 100 hours with 1-second resolution. A 5th channel works as a calendar and alarm clock. A 6th channel is a 10-hour stopwatch with 1/100 sec. resolution, lap and split functions. Has a built-in stand for bench top use, clips to a pocket, or sticks to any metal surface with a magnetic back. 1 AAA battery included. Dim: 63.5 x 73 x 12.7 mm. Warranty 5 years.