Acroprint Model 125 Analog Manual Print Time Clock with Date/0-12 Hours/Minutes Manual heavy duty time recorder with numerous typewheel options Operates in any environment, developed for harsh and heavy use Lifetime warranty on print wheel Automatic ribbon feed and reverse Powered by 125VAC/60Hz. Will operate for several days on four (4) standard rechargeable "D" cells (included) even when the electricity is off. Batteries automatically recharge when power is restored. Excellent for areas where AC power is unreliable.