Systems and methods related to point-of-sale devices are disclosed. In an embodiment, a point-of-sale system includes a base stand having a receiving interface that includes first electrical contacts. The POS system may further include a computing device having a user interface, a docking interface comprising second electrical contacts, wherein the docking interface is configured to removably dock the computing device to the receiving interface of the base stand such that the first electrical contacts of the computing device are in contact with the second electrical contacts of the base stand. The computing device may further include a card reader configured to receive and read a card when inserted into the card reader and a scanner configured to scan machine-readable codes. The computing device may be configured to extend or enable various functions of the base stand when the computing device is docked to the base stand.