Gene Cafe CBR-101 Home Coffee Roaster Roast up to 250g of green coffee beans in about 15 minutes with the easy-to-use Gene Cafe CBR-101. Fully viewable roast chamber and fully adjustable time and temperature allow for maximum control over your roasts. Unique 3D off-axis rotation ensures an even roast every time. Impressively quiet operation. Works with standard 120v power.