Thanks for choosing our portable cooler box (more properly called a "Medication and Insulin Refrigerator"). By adopting the technology of most professional high-tech semiconductor refrigeration and heat prevention, with a simple and elegant design, our products can create high-quality, comfortable life for person need medication cooling when travel. Precautions: 1. When using external power for a long time, please take out the battery, over-charging and leaking. 2. If it is not used for more than one week, please take out the battery to prevent over-discharge. 3. Do not use for a long time, charge the battery once every three months to prevent over-discharge. [product specifications] Humidity Range: 2?- 8? Product net weight: 2kg Car input voltage: DC12V Household voltage: 220V Power:10W Box Contains 1 x Medical refrigerator 1 x Carrying case 1 x lithium battery(not included here No battery) 1 x 12V Car plug 1 x 220V AC mains adaptor (Adapters are available depending on the voltage in different regions) This product only contains a Medical refrigerator and does not contain any other items. Due to the manual measurement of the product size there will be a certain error, due to different spotlights and different screen colors, the actual object may have a certain color difference. Please refer to the actual product received.Many work environments reach extreme temperatures even climate controlled areas can be shut off at the end of the business day. Most people prefer privacy for their insulin storage, rather than placing it in a shared refrigerator. Insulin cooler box is designed to provide a convenient and affordable way to keep medicines (such as or other medicines that are injected,) at a safe temperature. Cold storage temperature: 2-8?(35.6-46.4?), Fast cooling and high efficiency, insulin fridge can reach 8 C in 10 minutes, 2-18 C precise temperature control to meet the temperature needs of medicines. Long battery life, built-in 13,600mAh high capacity battery, fully charged for 6 8 hours of continuous use, Keeps medication at a safe temperature at all times, comes with a portable carrying case, can be taken on planes or trains for more convenient travel. 12V AC 220V DC: Computer USB, home, car, charging treasure, can be used anytime, anywhere, anywhere, Button touch setting, easy to operate. Internal size of box: 7.3(L) x 2.4(W) x 1(H) inch.