Time Timer audible Large (available upon request)

  The largest Time Timer for classroom and offices. The Time Timer Large is ideal for large classrooms and work spaces. Big bold numbers make it easy to read from across the room. It operates free-standing or wall-mounted. Customize yours with a blank face and stickers (see the third video below). Optional soft alert when time is up. Operates on one AA alkaline battery (not included).
Dimensions: 30 × 30 cm.

Useful videos:
How Time Timer works
At Work with Time Timer
How to use Time Timer Blanks (Be creative!)