Easy to use and Intelligent battery saving: Twist One Button Operation, So simple that elderly grandma and 5-year-old kids can use it easily.Siliver knob and Black body,just twist the knob to set the time,press to start or stop .The digital light will be darken in 5 seconds and shutdown in another 5 seconds,which can last battery life. .Magnetic&Time management: With magent on the back, you can stick to classroom whiteboard, cooker,task, students tablet, iron wall, fridge, sports gym or other steel place. help students focus on study, Time Management on shower ,games etc, teacher organization for classroom, mothers cooking ,baking ,egg boiling, also help those with Autism ADHD ease transitions and encourages independence and productivity for all abilities. .Large LED Display and Constant Bright Function: 3 inch Large screen with Constant Bright Function. The Constant Bright digits make it easy to read at a long distance.Even in big meeting room, classroom ,or big kitchen, exercise room. .Loud Alarm and Digits Blink function: 3 levels alarm sound mode,can be silence ,normal,or up to 90db. Does not beep unnecessarily when making a timer setting. Can hear this alarm in another room,no more worry about overcook.Blink led digital number will remind you when time arrival in Silent mode.