The Time Timer MOD Sprint Edition is a 60-minute visual timer that comes with a handy Quick Start Guide highlighting the key principles of a 'design sprint' framework, developed by Google Ventures as “a framework for teams of any size to solve and test design problems in 2-5 days'. This set includes a Time Timer MOD with removable Sky Blue silicone cover and the Sprint Starter Guide. The 3.5”x3.5” Time Timer features optional audible alert sound and glare-free lens. Requires one AA battery (not included).