Technical patameter: heating: semi hot air heating rid : 1- 41111u batch capacity: 100-800g roasting time: 10-15 minutesper durm heating source: lpgngpropaneelectric the inner drum meterial: far infrared coating coated on cast iron. voltage single phase 220v, 50hz power: 300w heating power: 3000w (electric type) hot air adjust: 0-100 temperature range: 0-300c machine dimension: 756085cm machine weight: 75kg usb data logger connect to computer package: plywood