A pellicle utilizes a thin film attached to a frame. When the controller changes the first wireless communication configuration, the controller connects to the second host device using the second wireless communication configuration, and the first interface notifies an error to the first host device not to write data into the memory area. The basic conductive wire unit comprises a conductive wire layer and a magnetic-conducting sheet conformably stacked on and insulated from the conductive wire layer. Multi-carrier modulation may be applied to existing fiber channels, which may be of lower quality. The ski binding adaptor with floating heel lock mechanism is optionally compatible with a range of alpine ski touring and downhill bindings. Included in the circuit is an input node for applying a voltage signal, a first switch in series with the input node, and a resistance in series with and in-between the input node and first switch.