The Jumbo Timers Class Set of 30 Timers can time up or down to 99 mins and 59 seconds.A bleeping alarm is sounded to say the time has been reached.The Jumbo Timers Class Set of 30 Timers have dual power functionality means they are always charged and ready to go. The push buttons have been designed for ease of use. The timers can be used in numerous situations where a hands free time period needs to be set or measured such as in scientific experiments, for circle time, for games, for the timing of tests and a hundred and one other uses. Colour coded for easy identification.Class set supplied in a Gratnells tray with lid and foam insert. Uk direct deliverySupports the following areas of learning:• Maths - time• Enablng Environment - practical resourcesSpecificationTimer size: 65 x 65 x 13mm. Display 53 x 25mm. Pk30.