Thank you for choosing our portable cooling box (more appropriately called "medicine and insulin refrigerator"). By using the most professional high-tech semiconductor refrigeration and heat protection technology, the design is simple and elegant, our products can create a high-quality, comfortable life for those who need medicine cooling when traveling. Refrigerators for medicines are mainly used for low-temperature storage of insulin, needles, and insulin pens. ?Product parameters: Power adapter input output voltage: AC100V-240V DC 5V Battery information: 8000 mAh lithium ion Battery life: 8 hours Piece Power: 10W Refrigeration external dimensions: 210 140 55 mm Refrigeration internal dimensions: 192 62 25mm Internal temperature: 2-8 degrees Celsius ?Product list: 1 insulin cold box 1 Suitcase 1 Charger 1 USB power cord 1 Built-in battery ?Note: 1 It is forbidden to squeeze the small refrigerator with excessive force. 2. It is forbidden to use the machine in high temperature and immersed in water. 3. Do not block the ventilation holes. If you have any questions, please feel free to contact us and send us a message, we will reply to you within 24 hours.[Various Power Supply Methods]:Whether in the car, on the plane or on the road, you can use the home power outlet, USB interface, car charging, charging power supply. [LIGHTWEIGHT, LOW NOISE]:Lightweight medicine refrigerator is easy to carry. Turbine mute technology, the working sound is kept below 30 decibels, and then the low noise operation of 30db can provide you with a quiet environment. It is an excellent partner for your travel. [HIGH-QUALITY MATERIALS]: Environmentally friendly ABS material, polymerized with UV spray paint, non-toxic, odorless, easy to clean. The coating is made of electrolytic aluminum, its cooling rate is reduced, and it is resistant to corrosion and oxidation. [LONG STANDBY TIME]:Built-in qualified 10400mAh battery can ensure 8-12 hours of standby time on a single charge. With sufficient power, the cooling temperature can reach 2-8? (less than 25?). [LARGE REFRIGERATION CAPACITY]:Our insulin refrigeration box adopts a 210 140 55mm large refrigeration space design, which is suitable for the recovery of medicines in the past 3 months, about 3-5 injection pens 9 bottles of syringes.