This brand offers a yogurt maker model with electronic temperature control that maintains an optimal temperature during preparation, but it does not have adjustable temperature settings; the ripening time can be set from 1 to 18 hours, but temperature is fixed for the JG 40 model. The temperature is controlled electronically to ensure optimal conditions but cannot be manually adjusted to specific values like 35-38 °C required for L. reuteri yogurt fermentation.

However, another model from the same brand, the JG 80, features four preset temperature programs including one at 38 °C, which is suitable for vegan or lactose-free yogurt and could be used for L. reuteri yogurt fermentation. This model allows temperature selection among preset options and adjustable fermentation time up to 24 hours, which fits the 24-48 hour fermentation requirement better.

In summary, the JG 40 does not have temperature adjustment suitable for L. reuteri yogurt, but the JG 80 model from the same brand does offer temperature control at 38 °C and adjustable fermentation time, making it more appropriate for your needs.