The screen measure approx. 1.5 x 1 inches, clear digits, the digital timer measures approx. 2.8 x 2 inches, lightweight for everyday use and you can easily read the timer display with it's big, bold digits, easy to carry or put in your pocket or purse.It has an audible reminder but it's a timer, not an alarm clock, so it's not that loud; It's time to say goodbye to underdone burgers and overcooked steaks; Note: our products just has one battery, you need to buy another LR1130 particle if it has no electricity.the maximum setting time of 99 minutes and 59 seconds will be accompanied by a reminder, it will work well as kids, teachers, students, cooking, classroom, bathroom, meeting, game timer, BBQ, exercise, gym workout and reading timer.