Review on ⏱️ White Marathon 24-Hour Countdown Timer with Clock, Count-up, and Compact Digital Display by Cristina Franklin

Handy because it has a forward and backward countdown and a clock display. It's easy to install and use. As mentioned in other reviews, the countdown starts when the countdown reaches zero so you know how much time has passed since the countdown ended. My complaint is that it's not loud enough. Its beep is very high-pitched, and if you can't hear high frequencies well, the alarm isn't loud at all. It runs on a coin cell battery, so I imagine using lower frequencies would be very taxing.