The Timer and Function knobs are replaceable but the Temperature knob is not. If you require a replacement knob, please call Dualit Customer Service on 01293 652500 (UK delivery only).
Yes, you can. However, boats and caravans usually have maximum kW loading limits. The mini oven requires a 240a.c/1500 watt supply.
The internal capacity of the mini oven is 14 Litres, with dimensions of 305x260x180mm. It will accommodate a 2kg, medium sized chicken.