The Fresh Roast SR300 is the successor of the original Plus 8 coffee roaster model, and a bit larger of a version, roasting twice the capacity of the Plus 8 - ~4.3 ounces of raw beans, and includes a simple digital time display.
The maximum time to set the control is 9.9 minutes. At any point during the roast sequence you can add 6 seconds every time you tap the button. Time can be subtracted using the same method. The timer can be overridden by tapping the “Cool” button, the roaster will go into the “Cool” mode for 3 minutes. An even larger unit, the Fresh Roast SR500, is also which has the same capacity as the SR300, but includes more functionality in controlling the roast variables.