Quickly Perform Tedious Time-Math Calculations / Accurately Track or Schedule Hours / Cut Production Costs & Scheduling Errors The Time Master II is a versatile, easy-to-use calculator for time-math measurements, conversions, schedules, rate-based estimates and solving elapsed time calculations using its built-in stopwatch/timer. Instantly determine time-based costs and rates for billing and estimates. It is an ideal tool for Cooks and Chefs monitoring cooking time - up or down. Students and public speakers time presentations. Coaches and Athletes use the Time Master II Stopwatch and Timer with Split/Lap feature to track elapsed times and performance. # The Time Master treats a time value in hours and minutes like a traditional calculator treats a decimal number. Times can be entered in AM/PM format, as a 24-hour time, or as an arbitrary duration up to 10000 hours. Calculate the duration between two events (and then multiply that by your hourly rate). Divide an interval into several parts, or divide that interval into shorter intervals to see how many will fit. Type: Four-Function Electronic Calculator with Sexagesimal Time Arithmetic # Display Type: LCD, 8 digits # Power: One 3-volt (CR-2032) Long-life Battery (included) # Size: 5.5 x 3.0 x 0.5" # Weight: 3.2 oz.