From the a.t. guys website:
The Meteor Vibrating Pocket Watch allows you to independently know the current time without disturbing others. It features a simple, three-button design and is especially ideal for persons with hearing loss.
The Meteor indicates time by inaudible and discreet vibrations. It has 3 buttons: The upper button for Hours, the central button for Tens of Minutes, and the last button for Minutes.
- 3 short vibrations indicate 3 Hours or 30 Minutes or 3 Minutes depending on the pressed button.
- 1 long vibration indicates 5 Hours or 50 Minutes or 5 Minutes depending on the pressed button.
- 2 long vibrations followed by 2 short vibrations indicate 12 Hours.
- no vibration indicates 0 Tens of Minutes or 0 Minute depending on the pressed button.
The buttons may be pressed in any order For example, you can check just the Tens of Minutes and then the Minutes.