[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. 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.