Feature
With a special R best technique ,remove gaps of vacuum insulation material. Allow body and the cover tightly closed vacuum to cut off heat, and using foam urethane which allows cutting off heat at its maximum.
In 25degree, the vacuum case could maintain a constant temperature of 33-36 degree inside the case for up to 150 hours and or beyond. In 5degree, the vacuum case could maintain a constant temperature , the case for up to 60 hours.
IP Tempetature Holding Test