Required to operate HOBO and StowAway Recorders. BoxCar starts your HOBOs or StowAways. Choose your start time and sampling interval, perform battery checks, and read and report your data. Choose measurement units Fahrenheit or Celsius, display multiple data windows, copy and paste graphs or spreadsheets into other applications like Lotus or Excel. Only one software package required to operate all your HOBO or StowAway Recorders. USA made. System requirements-windows 3.1 or later, 386 or better processor and one open serial port. For additional graphing and data manipulation see BoxCar Pro Version 4.0.