Most personal, portable coolers are variations of the fan theme with the occasional blower thrown in. In essence, they work by circulating regular and/or cool air. What makes the Thanko Neck Cooler EVO much more effective is that it uses its electric power to freeze two plates that touch the sides of your neck. So, it's basically an electric ice pack that lowers the environmental temperature from a moderate 4°C (39.2°F) to a whopping 13°C (55.4°F), depending on the method you use to power it. Because, and this is what makes it more versatile, there are two!
The Thanko Neck Cooler EVO comes with its own battery that you can charge (it takes about 4 hours) as well as with a USB interface that allows it to power from any USB battery you happen to have. Depending on the battery and the setting (it has three: low, high, and alternating), you get up to 20 hours of continuous cooling making it adaptable to any work or play situation. And it comes in two colors, so you can accessorize with your wardrobe!
The Thanko Neck Cooler EVO features: