Features: Visual Timing: With a clear and easy-to-read display, our timer provides a visual representation of time passing, making it ideal for managing tasks, meetings, and activities. Quiet Operation: Say goodbye to loudticking sounds that can be distracting. Our timer operates silently, making it perfect for individuals with sound sensitivity or for use in quiet environments. Easy to See: Enjoy a clear and unobstructed view of the timer's countdown, allowing you to monitoring how much time remains at a glance. Simple Operation: No complicated instructions here. Just turn the knob clockwise to set the desired time, and you are readys to go. It's that easy Battery-Powered: Powered by AAA batteries not included, our timer offers portability and convenience for use anywhere, anytime. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description Working temperature: 0°C50°C Working voltage: 3V 2 AAA batteries self-provided Volume: ≈70dB±5 Product size: 70*30mm Timing range: 1, 3, 5, 10, 15, 20, 25, 30, 35, 45, 60, 90 minutes Package List: 1x Classroom Countdown Clock