Does all electric tooth brush has two-minute timer ?

Oral-B electric toothbrushes include a 2-minute timer to help you brush for the dentist-recommended 2 minutes. As we learned, brushing for a full two minutes is extremely important when brushing your teeth. Fortunately, every toothbrush we tested included a built-in two-minute timer, which allowed us to not cheat on our brushing session. Additionally, many toothbrushes also include a vibrating alert every 30 seconds that reminds you to move on to the next quadrant of your mouth, making it easier to remember to cover all of your teeth. Many toothbrushes, although not all, allow you to pause your toothbrush for up to 30 seconds without resetting the timer.