Feature: 1. CONSTANT TEMPERATURE: Insulin refrigerator box ensures that your medications, such as insulin, are kept at a safe and consistent temperature, providing peace of mind while you travel. 2. PORTABLE AND VERSATILE: This compact and lightweight insulin refrigerator box is designed for on the go usage. It can be easily carried in your bag or luggage, making it convenient for travel, work, and outdoor activities. 3. INSTANT COOLING: Equipped with a powerful 12V cooling clamp and an aluminum interior, this Insulin Refrigerator Box can quickly cool down medications within 10 minutes, even in high temperature environments ranging from 32‑40°C. 4. USB POWER SUPPLY: With a built in lithium ion battery, this insulin refrigerator box can be easily connected with USB cable. It eliminates the need for disposable batteries, providing an eco friendly solution. 5. AMPLE STORAGE CAPACITY: Insulin refrigerator box can accommodate up to 3 pre filled insulin pens or 9 insulin cartridges, or a combination of both. It provides ample storage space for all your medication needs. Specification: Item Type: Insulin Refrigerator Box Material: ABS Battery: Lithium ion battery pack x 1 (Battery not included) Battery Model: 18650 Cooling Temperature: Below ambient temperature 25°C Cooler Range: 2-18°C Applicability: Suitable for home, office, vehicle, pharmacy, hospital, etc. Suitable for refrigeration: Insulin, interferon, and other drugs and biological products that require refrigeration. Package List: 1 x Insulin Cooler 1 x USB Cable 1 x Hand Strap 1 x Storage Bag 1 x User Manual