A key fob includes a biometric sensor including a fingerprint area sensor having a surface for receiving a finger, and a controller includes at least one processor configured to authenticate a user of the key fob based on biometric information obtained with the biometric sensor and stored biometric information for an individual. The key fob includes a RF transmitter for communicating stored transaction information to a reader upon authentication of the user and a housing. The housing includes a base for supporting the biometric sensor and a cover sleeve slidably engaged with the base to allow for extension from and retraction into the sleeve by the base, thereby permitting selective exposure of the fingerprint area sensor under user actuation.