Bell, Shake, Light Timer,99minutes 99hours timer Large Display 3-in-1 Timer for the Visually and Hearing Impaired by IVI Stationery Dual timers with count up/down functions is ideal for visually or hearing impaired as well as for use in noisy environments The timer gives user the a choice of setting vibrating, audible and flashing alerts also Visual and adjustable alarm sound This timer provide several mounting options with a spring clip, stand, or magnet Features switchable 20 hour/20 minute resolution plus automatic memory; 2 AAA batteries (Not Included) are used to power this timer This timer also ideal for use by physical therapists and nurses in healthcare applications but Large, easy to read display