Magnetic. Easy to apply to metallic surfaces. Two-tone dial. The selected time is marked red and decreases with progressive. This allows for easy monitoring at a glance. Practical and functional. Due to the small size, magnetic system, two-tone dial and alarm, it can be attached to any fridge, cooker hood or metal shelf. Important: In order to optimise the duration of the alarm tone for these mechanical timers, it is recommended to perform a full turn clockwise (up to 59th minute) and then turn back to the desired time. Dimensions: 6 x 6 cm. Material: stainless steel Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia