Small enough (2.25 inches x 1.25 x .50) to conveniently fit into a pocket or purse, yet large enough to keep you from misplacing your keys, this convenient clock/keychain has a surprisingly loud and clear voice. This terrific little clock keychain speaks either standard or military time. A built-in alarm (beep) can be set to remind you of appointments. Other features include alarm, snooze, and hourly announcement. Batteries included.