1 Blue & 1 Green digital timers large display and 3 buttones, super easy to read and set up. (Battery Not Included) Maximum time is 99 minutes 59 seconds, meet the need of classroom and after-school activity perfectly, great countup / countdown timer for teachers kids. Classroom timer with Strong Magnetic back 2.0 retractable stand and hook for hanging, can be positioned in variety of locations, like table, blackboard, dry erase board and wall hooks. Memory Setting: You do not need to set the countdown time every time, it will remeber your last time and you only need to press ""ST/SP"" button. Click ""Add to Your Cart"" get these Perfect teachers & children timer for shower, homework, exercise, gym workout, games and reading.