The Gene Cafe Roaster This new roaster has a combination of a drum and a fluid bed roaster which coffee aficionados will love in this new innovative design.The Gene Roaster allows more flexibility to control the roast while having a greater visual advantage with its tempered glass drum design. The roaster's drum has an innovative vortex twisting motion that allows the beans to tumble evenly while hot air circulates around them. Large capacity chamber allow roasting batches as large as 300grams to as small as 50grams. Since the key to producing the perfect roast is having more control over the variables. Two knobs on the front of the unit can be adjusted for time and temperature. A manual cool button allows you to stop the roasting process at any point you feel the coffee is ready.While some of the better roasting machines allow you to program your roast; once the roasting process begins, the flexibility to make changes are limited, if any. The Gene Cafe Roaster has added this feature so that you can make unlimited changes in the temperature and/or time settings before and during the roast. (Since not all beans roast the same- this is a great feature - we love that!) The cool cycle takes place in the drum. When the eternal temps reach 140 F, the drum stops and alerts the roaster with an auditable beep. The unit's operation is impressively quiet. It may take a few roasts to discern from the pops in the roasting stages from the beans hitting the glass as they tumble. In addition to the illustrated owner's manual, a 1 year warranty is included with the roaster. Additional parts include an attachable chaff collector which sits on the side, a chamber support which holds the chamber when not in use, and cup to measure for beans.Never leave a roaster unattended when roasting coffee.