Sper Scientific 810024R Count Up/Count Down Timer Sper Scientific 810024R Count Up/Count Down Timer 99 Min | Numeric keypad allows for fast programming. Counts up or down for 99 minutes in intervals of 1 second. Has a built in stand, pocket clip, and magnet. Range: 99 Min l Count Up Channel: 1, Count Down Channel: 1 Resolution: 1 Sec Dimensions: 2-1/2 x 2-5/8 x 6/8" 99 Minute