Buyers must ensure the machine meets CE, RoHS, or UL certifications depending on the destination country to ensure electrical safety. Key technical specs include a high-performance compressor (like Embraco or Secop) for energy efficiency and a MDB (Multi-Drop Bus) interface, which is the industry standard for integrating cashless payment systems, bill acceptors, and coin changers. Additionally, look for LED lighting and R290/R134a eco-friendly refrigerants to meet global environmental regulations.