Abstract: A device for delivering a scent to a user comprises a body component, a fluid reservoir, an output component arranged to connect the fluid reservoir to the exterior of the device, and a control component arranged to receive biofeedback data and user preference data on the user, and to control the output from the fluid reservoir accordingly. The device can further comprise a sensor arranged to monitor a physiological parameter of the user and to communicate the biofeedback data to the control component. The device may also include a wireless receiver arranged to receive the user preference data and/or the biofeedback data and to communicate the data to the control component.