Wondering how a medical cooler box ensures safe vaccine transport? In this video, we take you inside Henan Phefon Cold Chain Equipment's state-of-the-art facility to see the 35L medical cooler box in action. Watch as we demonstrate its WHO-compliant design, temperature control capabilities, and real-world applications in pharmaceutical logistics. Learn how this equipment meets international standards like CE and WHO PQS, and discover its role in maintaining cold chain integrity for sensitive medical supplies.