Ketteler & Funcken, operating under the brand TRETMANN, specializes in the development and distribution of sports equipment, including rowing machines and pedal trainers. The company primarily sells its products through Amazon and its own online shop, focusing on the DACH region. With a fully remote team spread across five countries, Ketteler & Funcken emphasizes flexibility and work-life balance, offering part-time positions in customer service that can be tailored to fit individual schedules. The company values experience in customer service, particularly in technical products, and fosters a supportive work environment that encourages personal growth and a positive attitude.