Introducing the Colormetrics expansion cover for C1000 mPOS, including a 6800mAh battery and 3-Track MSR. This USB-A expansion cover is designed to enhance the functionality of your mobile point of sale system. The lightweight and durable design make it a perfect addition for on-the-go businesses. Manufactured by Colormetrics, this expansion cover is a must-have for businesses looking to boost their mPOS capabilities.