This insulin cooler is perfect for drives and trips, as it has a built-in battery and a car cigarette lighter. Comes with a convenient carrying bag. ・Purchased on Amazon. ・As of October 15, 2025, operation confirmed. ・Buttons, LCD, and charging are all in good working order. ・There are minor scratches from use, but no defects. ・The internal battery has not been used at all. ・Lightly cleaned. ・No instruction manual or box. Brand: M-COOL Accessories: Main unit, USB cable, car cigarette lighter, AC adapter, dedicated shoulder bag, battery ▶ Insulin Cooling Box: This medical refrigerator is designed to provide a convenient way to keep medications (insulin/interferon/growth hormone/vaccines/eye drops, etc.) at a safe temperature. 0℃～18℃ ▶ Large Refrigeration Capacity: The insulin cooler box is designed with a refrigeration space of 175 * 60 * 26mm, which can store approximately 3 months' worth of medication, about 3-5 injection pens / 9 insulin vials. ▶ Long Battery Standby Time: The built-in 10400mAh certified battery ensures 12 hours of standby time on a single charge, and can reach a refrigeration temperature of 2-8℃ (below 25℃) with sufficient power. ▶ Multiple Charging Methods: As convenient as a mobile phone, built-in rechargeable lithium battery, long working hours, USB charging, simple and convenient, suitable for use at home, in the car, and on airplanes. ▶ Lightweight and Low Noise: Lightweight at 780g, the medication refrigerator box uses a brushless high-end fan and is easy to carry with less than 30 decibels during normal operation. It has a quieter and longer-lasting function than ever before, allowing for a quiet and comfortable sleep.