Easy-to-see and easy-to-dial 60-minute mechanical timer features BIG tactile numbers. Great for indoor and outdoor use and the visually impaired. Oversized dial is also perfect for those with arthritis. Timer measures 8 inches diameter. Each number measures a tall 1.125 inches. Black timer with white numbers. NOTE: To activate the mechanical spring timer, first turn dial to 55 minute mark before dialing to your desired time. Timer measures 8 inches diameter. Numbers measures a tall 1.125 inches high.