Select either a bright flashing yellow LED visual alarm or an audible alarm. A memory recalls the last timer setting for reuse. This model is often used by testing organizations. Built in stand for bench top use, clips to a pocket, or sticks to any metal surface with a magnetic back. 2 AAA batteries included.Dimensions: 3 x 2 x 5/8 Inches Weight: 2 Ounces Range: 99 Minute 59 Second Resolution: 1 Second Count Up Channel: 0 Count Down Channel: 1 Recalls Previous Setting: YesShipping Weight: 1 lbsShipping Dimensions: 2.50 x 3.75 x 1.25Research or further manufacturing use only, not for food or drug use.