Dual timer records 2 separate activities at the same time with a functional duration of 59 minutes and 59 seconds Alarm volume setting switch so you can use the timer in noisy areas with the high setting or quiet environments with the low setting Mute setting when only the visual flashing indicator is desired Perfect timer for the hearing impaired, noisy areas, schools, cooking, or any other activity Built-in clip allows you to attach the timer on your belt, pocket, or apron Magnetic back attaches to metal surfaces