Precise Temperature Control:The insulin travel cooler is equipped with a high-performance cooling system and thick insulation, keeping insulin safely stored at 32-64F (0-18C). The temperature can be manually adjusted to your desired setting. Ideal for long-distance travel or hot climates, this cooler prevents insulin from being damaged by high temperatures. Dual Power Design - USB Charging + Backup Battery:The insulin travel case offers multiple power options: USB charging for daily use and a backup battery for emergencies, air travel, or power outages, providing maximum flexibility for insulin storage. The backup battery is rechargeable-simply place it in the battery compartment and connect it to an external power source to charge.Note: To prevent damage, remove the battery when the insulin cooler is not in use. Portable and :This medicine travel cooler fits easily into a backpack or suitcase. The spacious interior holds 1-7 insulin pens, yet the unit remains compact and -perfect for flights, camping, road trips, or everyday carry. Practical and Protective - Waterproof Shell + Smart Display:Built with a sturdy, waterproof shell that guards against impacts, splashes, and drops. The digital temperature display lets you monitor the internal temperature in real time, ensuring your medication remains safe and effective. Low-Noise - No-Disruption Design:Designed with quiet operation in mind, this cooler runs at less than 35 decibels, making it ideal for use in hotels, trains, airplanes, or bedrooms. It ensures a restful environment without disturbing your sleep or others around you. Color: Black Material: plastic Package Contents: 1 * Insulin Cooler Travel Case 3 * Batteries Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.