[Portable Use]Start the timer by long-pressing the power button. The timer will automatically display the preset time facing upwards and begin the countdown. This polyhedron desk efficiency timer is simple, compact, and easy to carry. You can place it in your pocket, backpack, or handbag compatible withuse anytime, anywhere. [Various preset times]The 12-sided timer features 11 preset countdown durations (in minutes: 5, 10, 15, 20, 25, 30, 35, 40, 45, 60, 90). With a simple flip, the timer starts in just one second. [Perfect Time Manager]The 12-sided timer is the perfect time management tool, designed to help you stay focused on any task at hand, whether it's studying, writing, boosting productivity, cooking, boiling eggs, baking, exercising, homework, or classroom activities compatible withkids. It's an ideal companion compatible withany scenario where precise time management is essential. [3 modes]This product offers three alert modes: sound, vibrations, and silent. When flipped with the digital side facing up, it starts the countdown, and the display flashes (allowing you to switch to another duration within 5 seconds). After 5 seconds, the flashing stops, and the duration can no longer be changed. Color: Black Material: ABS Specification: Package Contents: 1 timer 1 charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.