主权项 |
1. A wearable device for providing alert signals to a user, the device being adapted to be secured adjacent the skin of the user and comprising a controller adapted to receive an alert instruction corresponding to an alert event, and at least one electrode arranged to be in contact with the skin in use of the device for providing an alert stimulus, the controller being arranged to actuate the electrode(s) to supply an alert signal in response to the alert instruction, the alert signal comprising at least one pulse to cause a sensation in the skin of the user, in which, in response to the alert instruction, the controller is configured to select one of a plurality of alert signals in dependence upon the alert event. |