42 hours of cooling without the need for wires For quick cooling, the Anker EverFrost 30 has a detachable 299Wh battery that can maintain a temperature of 39°F (4°C) for up to 42 hours. Additionally, you can change the temperature from -20° to 20°C if you'd like. Different methods for recharging provides four easy charging options, guaranteeing a limitless supply of power for all of your cooling requirements. 60W USB-C, wall outlet, car socket, and solar (maximum solar input of 100W). 100% Storage, 0% Ice Enjoy twice as much storage space as conventional coolers without using ice when you use Anker EverFrost. Bid farewell to unused space and welcome to useful storage, perfect for trips lasting a week. An effective cooling system featuring a 50mm insulating layer, an impermeable 7mm-thick seal strip, and a cooling compressor with a 3-year warranty.