Marathon ST083016BK Clipboard Stopwatch with Calculator, Clock & Timer-Latest Edition.

• New and Improved multi-purpose clipboard with calculator, clock, stopwatch & timer
• Calculator with full memory; stopwatch with single-event, pause and cumulative split timing; 24 hour count-up timer; real-time clock with 12 or 24-hour formats with time of day and calendar
• Two way power: built-in solar cell battery with backup 1.5V replaceable button battery
• Accommodates letter-sized 8.5 x 11 paper; built-in paper guide and ruler
• Great for home, office and lab settings