What is the USB to DC 7.4V Control Cable and how does it work?

The USB to DC 7.4V Control Cable is a 1.5-meter long cable that has a USB plug on one end and a DC jack on the other. It is compatible with most cooling fan jackets that use a 7.4V battery pack, such as the ones from Cooling Fan Jacket.

The cable works by boosting the voltage from 5V to 7.4V, which is the standard voltage for cooling fan jackets. This means you can use any USB power source to power your cooling fan jacket, instead of relying on a battery pack. You can also use a power bank to extend the battery life of your cooling fan jacket, as most power banks have a higher capacity than the battery packs that come with the jackets.

The cable also has a switch that lets you control the fan speed of your cooling fan jacket. You can choose from low, medium, or high settings, depending on your comfort level and the weather conditions. The switch is located near the DC jack, so you can easily access it without taking off your jacket.

The cable is easy to use. You just need to plug the USB end into a power source and the DC end into your cooling fan jacket. Then, you can turn on the switch and adjust the fan speed as you wish. The cable is also flexible and durable, so you can bend it and twist it without damaging it.