Rotary timer & easy operation: big digital timer is quick easy to adjust a time only by twisting outer ring, and one touch button to just start/stop time countdown countup (timing range 0-99 minutes),designed for kitchen,classroom,fitness,meeting and more, whether we are elderly or kids, this rotate timer, we can easily control and use it.Multiple scenes use:what will this twist timer bring to us?Eg,as a kitchen cooking timer,you will say goodbye to over-raw or over-cooked steaks, even you more like a pro! as kids timer, to grow childrens awareness of time, reminding kids to balance games and learning, also be teachers timer, students timer, classroom timer, exercise timer, barking timer, meeting timer, game timer, egg timer, gym timer,BBQ timer .Continuous light & Big digits:Three levels brightness are respectively CONSTANT BRIGHTNESS MODE , DIM MODE and LIGHT OFF ,for satisfying different requirements, According to ambient light setting a mode what you need, caring about your eyes and enjoying LED big digits. what a smart visual timer!Loud alarm & Magnetic:Three levels alarm sounds from silence up to 90dB.Loud alarm ensures the sound heard in another room, smart time reminder, we will no longer worry about over-cooking or forget something what we should have done but didn't.Strong magnets on back can firmly stick on refrigerator,oven,blackboard and any iron walls, to facilitate 1hand operate. Energy saving & 365 days Guarantee:Powered by 3 AAA batteries if timer doesn't run and without any operation, display brightness will turn dim then light off in a few seconds. Don't worry it will not consume energy in the sleep mode.