Built-in micro USB cable for recharging any USB-device
It's difficult to unplug entirely - and now you don't have to. Finding a charger for a mobile phone or other device in the outdoors can be a hassle, which is why the device has a handy micro-USB built in, meaning you'll always have enough power for music and movies, or just for your peace of mind. It's also great to act as a backup in the case of power outages. Take advantage of the device's kinetically-charged power source to keep powered up and connected.