This is a still-new 2023 model. However, after one year of use, it is currently displaying error code E4. After checking with a parts supplier, I was told that it can be used if the heater parts are ordered and replaced. (According to the supplier, the parts cost about 10,000 yen.) It seems there is only one specialized dealer for Gene Cafe parts, which can be easily found through an internet search. They also respond to questions via messages. As I'm changing my roaster, I'd like to offer it at a bargain price to someone who can order the parts and perform maintenance. Accessories include the instruction manual, the roasting drum and stand, and the rubber inside the drum. There are burn marks inside the roasting drum, but they can be cleaned by boiling it in water with baking soda. The following is the email content from the supplier: Thank you for your inquiry. In most cases, the E4 error code indicates a failure of the heater or fan. If the Gene Cafe is running and you can confirm airflow, it's likely the heater is faulty. If there is no airflow, it's likely the fan is faulty. The type of heater varies depending on the Gene Cafe model year, but we currently have all types in stock. For models prior to 2015, stock is decreasing, so we recommend purchasing parts early. If your machine is a model prior to 2020 and you have not replaced either the heater or fan, we recommend replacing both. Parts can be purchased from our website. Please feel free to contact us if you have any questions. - Brand: Gene Cafe - Model Name: Coffee Bean Roaster - Temperature Settings: Adjustable temperature - Maximum Capacity: 200g (300g possible) - Operation Buttons: Start/Stop button Thank you for viewing. Coffee Roaster Gene Cafe