Calculated Industries 9130 TimeMaster II
- Cut Production Costs and Scheduling Errors
- Built-in Stopwatch and Timer with Alarm; count-down or count-up
- Ideal for Time/Rate Estimates for time-based billing and estimates
- Add, Subtract, Multiply and Divide in real-time, AM/PM or 24-Hour
- Includes: Armadillo Gear Protective Case, English/Spanish User’s Guide, Long-life Battery.
Product Description
Solve hundreds of time-math problems with the touch of a few buttons! Use easy time-math functions, plus a built-in stopwatch/timer for film/video, athletics and other applications. Instantly solve:… More >>
Calculated Industries 9130 TimeMaster II

I’ve used this many times to add hrs and minutes. It saves you a lot of time and it’s very handy. Another great feature is that you can use it as a stop watch.
I am a track and field coach, and needed sometime that I could use to work with the atheletes when tracking splits, target paces and improvement across the season. The ideal product would combine a stopwatch and a calculator, and except for something I saw that was appropriate for a TV producer (at a cost of $180), is not available. The second best approach is a hand-held calculator, and at $40.00, is a real value.