Abstract: An event notifier device suitable to be wirelessly associated to a telephone apparatus is disclosed. The event notifier device comprises a receiver arranged to receive a signal wirelessly from the telephone on incoming event notification associated with an event; an output mechanism arranged to provide a human perceivable signal indicating a notification on the event; and a body containing the receiver and the output mechanism, wherein the body further is arranged to be worn by a user of the event notifier device such that the user is enabled to perceive the output signal, wherein the body comprises a fastener. A headset comprising such an event notifier device is also disclosed.