Feature 1MAGNETIC: This mechanical clock timer has a strong magnetic backing that is perfect for placing on refrigerators, ovens, utility cabinets, classroom whiteboards and more. 2EASY TO USE: To activate the timer before each use, turn the control knob clockwise to the 55 minute position and then counterclockwise to the desired time to complete the setting. 3TIME MANAGEMEN: Perfect for improving time management and increasing work efficiency. Such as taking exams, managing games and bedtime, setting timeouts and making sure you brush your teeth long enough. 4CONVENIENT: Countdown timer can help with special needs. The brightly colored disc disappears in a design that helps simplify transitions and helps children visualize the passage of time. 5MULTIPLE APPLICATIONS: Mechanical countdown timer with high accuracy for school classroom, office work, kitchen cooking, gym fitness and more. Battery free and durable.SpecificationItem Type: Mechanical Countdown TimerMaterial: Stainless Steel, MagnetsGross Weight: Approx. 154g/5.4oz .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Mechanical Countdown Timer1 xInstructionManual