twenty5 seven silent countdown timer 3 inch, 60 minute 1 hour visual timer, flashing-light and alarm mode, office meeting classroom teaching tool, countdown clock for kids exam time management - black twenty5 seven this twenty5-seven 60 minute visual timer with flashing-light is the perfect tool to maximize productivity and concentration in sound sensitive environments.<br/> <br/> its compact design makes this product perfect to sit on any desktop or surface, without cluttering the desk. there are two business colors to choose from: black and white.<br/> <br/> the mode and the duration of alerts are easily adjusted, allowing you to make it clear when the time has expired, while providing the option to prevent the alarm from being too overwhelming.<br/> <br/> the timer is made of high-quality materials and features a unique design. it is the ideal tool for managing time intervals at the office, workplace, home or in a school environment. perfect for managing time when doing homework, household chores or cooking.<br/> <br/> the timer requires 2 aaa batteries (included).<br/> <br/> <b>attention: do not turn counterclockwise when pointer is at zero (0), otherwise the clockwork mechanism will be damaged. gentle handling will prolong the life of the timer.</b><br/>