This DC Barrel Jack to USB Micro adapter cable is extremely handy – it has a 2.1 x 5.5mm DC Barrel Jack on one end with (Center Pin Positive) and a USB Micro connector on the other end. The cable is perfect for using with a Raspberry Pi, Arduino, BeagleBone, Android device, or other USB Micro powered device. Keep in mind that the data lines are not connected in this cable so some devices that require resistance on the data lines will not work – mainly Apple products.