A heartbeat measuring device has a measurement unit that measures a heart rate of a user, and an information storage unit that stores unique information regarding a heart rate unique to the user or information regarding a detected heartbeat of the user. Cutting elements and methods of use are disclosed. A member-receiving passageway 29 is formed on each of the connectors 25 and extends generally perpendicularly to the elongated member 12\u201314 upon which the connector 25 is disposed. Actions also include selecting functions based on proximity within a device.