A neural feedback system uses a headset with electrodes for detecting brain waves that is coupled with a portable device such as a smart phone. Embodiments disclosed include units that can be provided in optical fiber-based distributed communications systems that are configured to support RF communication services and digital data services. In a preferred embodiment, a normal frame is padded by a border all around the normal frame size. In order to simplify the apparatus and improve its operation, the covering means comprises a slit extending across the entire width and open at its top and its bottom as well as smoothening elements at the ends opposite of the surface. The computer system determines if its computer ID corresponds with the computer ID used to activate the software.