Features: 1No Batteries Required: Completely mechanical countdown timer for school classroom office working kitchen cooking gym body building and more! High accurate mechanical timing. No batteries needed. Durable for years. 2Ideal Time Management Tool: Improve time management increase productivity with daily tasks and more! Examples: test taking managing playtime bedtime routines setting timeouts and making sure teeth are brushed long enough. Excellent timer to help children understand the passage of time visually. 3For Special Needs: The countdown clock can help those with special needs. As the time elapses the bright colored disc disappears. The visual design of this timer helps ease transitions and encourages independence and increased productivity for people of all abilities. 4Smaller Footprint: Powerful magnetic backing panels makes timer ideal to place on refrigerators ovens utility cabinets classroom whiteboards and more. 5Easy To Use: To activate the timer before each use turn the control knob clockwise to the 55 minute position then turn it counterclockwise to the desired time. Specification: Item Type: TimerMaterial: Stainless Steel MagnetWeight: Approx. 122g / 4.3ozThickness: 3.6cm / 1.4inHeight: 6cm / 2.4in Package List: 1 x Timer1 x Instruction