EASY TWIST OPERATION: All you have to do is to rotate it and the number will +/- with the minimum unit of 5s. 1 key operation, press the ST/SP button on the screen to start or stop counting. METAL KNOB: Unlike other timers, the outer ring is made of aluminum alloy, more durable and easy to clean. The design is inspired by the dashboard of the car, more elegant and technological. LARGE LED SCREEN/OVERSIZE DIGITS: Black screen and white numbers form a strong contrast, easy to see. 3 inches large screen and oversize digits reduce the burden of your eyes. MAGNETIC TIMER: 2 strong magnets on the back with non-slip pads for placing on any iron surface directly such as fridge door, microwave oven and etc. 99 Minutes Countdown Timer: Digital timer count down from 99 minutes and 55 seconds to zero, or as a stopwatch count up from zero to 99 minutes and 55 seconds. LOUD ALARM/MUTE: 3 levels alarm from 0dB to 90dB, meets your different needs. The silence design is ideal for classroom, library and office, the countdown timer will remind you with screen flashing. CONSTANT LIGHT/ENERGY SAVING: Our cooking timer has 2 brightness modes: 1.Brightness is constant; 2.Digits will dimmed in 5s and shutdown in another 5s if there is no operation, save the batteries. USE FOR MORE: Ideal for a kitchen timer, sports timer, egg timer, oven timer, homework timer, game timer and etc.