Patent ID: 8598981

Claim:
A key fob comprising: a biometric sensor comprising a fingerprint area sensor having a surface for receiving a finger; a controller, the controller comprising 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; a RF transmitter for communicating stored transaction information to a reader upon authentication of the user; and a housing, the housing comprising a base for supporting the biometric sensor and a cover sleeve slidably engaged with the base to allow for extension from and refraction into the sleeve by the base, thereby permitting selective exposure of the fingerprint area sensor under user actuation, wherein the housing comprises means for engaging a finger of an individual to facilitate one-handed movement of the base to an extended position by the user, the finger engaging means comprises a ledge for engaging a tip of a finger of the user, wherein the ledge is arched for mating with a fingertip and positioned to locate the finger over the surface of the fingerprint area sensor when the base is in a fully extended position exposing the surface of the fingerprint area sensor.