MARATHON TI030017BK Large Display 100 Hour Dual Count UP/Down Timer. Adjustable Volume and Flashing Light Feature. Great for Visually or Hearing Impaired (Black) - Battery Included 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 & MAGNETIC  Can stand alone or strong magnet on back sticks to metal surfaces