Marathon 100 Hour Dual Timer Black. Timer features an alarm volume setting switch to allow for use in noisy areas or for people with impaired hearing with the high setting quiet environments with the low setting or mute setting when only the visual flashing indicator is desired. This is the perfect timer for hearing impaired noisy areas schools cooking or any other activity. DUAL TIMER: Dual timers with count up/down functions. VISUAL INDICATORS: LED indicators switch from green to red when timer hits zero. ADJUSTABLE VOLUME: Choose between high low or mute. LARGE DISPLAY: High contrast large display is easy to read. STAND and MAGNETIC: Can stand alone or strong magnet on back sticks to metal surfaces. Specifications for Marathon 100 Hour Dual Timer: Manufacturer: Marathon Additional Features: Visual Indicators Adjustable Volume Dual Timer Stand and Magnetic Large Display Color: Black Condition: New Package Contents: Marathon 100 Hour Dual Timer Marathon TI030017-BK: 100 Hour Dual Timer Black