high-power and upgrade foam insulation technology fast cooling can keeping 36℉- 46℉ within the environment of 95℉ high-capacity samsung lithium battery 12 hours standby time aviation aluminum material inner it can carry three insulin inject pens,about nine insulin or interferon and about twenty refills Portable and fashionable Support DC12V Large LCD display, show the time and refrigeration temp clearly, interchangeable between 'C and 'F