Thank you for purchg our portable refrigerator (commonly known as the "medicine and insulin refrigerator"). Using the most professional high-tech semiconductor cooler technology. Insulin knowledge: Unused insulin can be stored for 2-3 years at 0-18 C. Used insulin can be stored at 25 C for 6 weeks. ? The free-standing medicine refrigerator can effectively prevent bacterial cross-infection. Clean and hygienic medicine is a prerequisite for everyone's health. ? Low noise design, the sound is no higher than 30db when working, giving you a quiet sleeping space. ? Insufficient power notification, large LED display, sensitive adjustment, intelligent temperature adjustment, aluminum inner tank to prevent the loss of cool air. ? Insulin, vaccines, eye drops and other medicines can be placed, suitable for travel, home, work, business trips, etc. product details ? Product name: medicine refrigerator ? Battery standby time: 8 10 hours ? Cooling temperature: 0-18 C (ambient temperature 30 C) ? Applicable voltage: AC 110-220V DC 12V Remarks: If you have any questions, please contact me by email in time![Portable]: When traveling, the medicine is exposed to unsafe high temperatures, which can damage the injected insulin and other medicines. With this portable refrigerator, the storage bag solves all the troubles. [Ultra-quiet operation] High-end brushless fan running under 30 decibels, quieter and more durable, suitable for personal space such as office, travel or car. [Applicable places]: The insulin cooler can be powered by USB, car charger, lithium battery and charging power supply. Designed for people who need to work in cars, planes, travel, offices, home and outdoors. [Fast Cooling] The insulin cool box can be adjusted to the desired target temperature and cooled in a few minutes. [Small and Cheap Refrigerator] Even if the ambient temperature is 30 C, the insulin travel cooler can keep the insulin at a temperature of 0-18 C.