One embodiment provides a computing device comprising a computing device body, a display coupled with the computing device body, a first set of computing components incorporated into the computing device body, and a securing system configured to secure the body to a wrist, the securing system comprising a plurality of detachable modular segments joined together to form a second set of computing components that is modifiable by changing segments. Each modular segment comprises a first mechanical connector and a second mechanical connector, a first set of electrical connectors and a second set of electrical connectors, and one or more electrical components incorporated into the modular segment, such that a functionality of the computing device is modifiable by changing modular segments.