Product 1.[VERY IMPORTANT 2 STEPS]: Before EVERYTIME use,wind the timer knob clockwise a full round,starts from 0 and ends to 0 until the timer pointer aligned with zero symbol.Wind the timer knob back counterclockwise to the minutes (number) you wanted it to ring.If fail to complete these 2-step procedures,the timer WONT ring. 2.[80dB SOUND ALARM]: The mechanical timer will make 80 decibel sound alarming and will last 3seconds+30miliseconds (Test distance 0.98 foot) when times up,the ringing sounds is audible within the distance at least 29.5ft (9m).Different floors DO NOT recommend to use.Tested under OPEN,straight-line distance circumstance,NOT noisy place.DIFFERENT use/test circumstances the result May VARY,ACTUAL using circumstance In Prevail. 3.[SIMPLE DESIGN]: Turning knob,retro mechanical tick tick sound.With this simple kitchen timer you can master your cooking time on a special delicious food. 4.[Application]: Ideal as a kitchen timer,sports timer,egg timer,egg timer,homework timer,timer for debates or as a game timer.