The Power Bank 3350 is designed specifically for the M-Series and is powered by an Anker PowerCore+ mini 3350 mAh battery. Vuzix's unique design enables users to hot-swap out the power bank, meaning you never need to interrupt your work when changing out the battery. Comes with a USB-A to USB-C 0.5m viewer cable and USB-A to USB micro charging cable. Hat and device are not included.