An electronic device for converting a multi-channel audio file to a dual channel audio file and vice versa. Advantageously, a superabsorbent polymer can be associated with any writing instrument element or component, in order to absorb a writing medium to an extent sufficient to prevent abnormal or undesired leakage of the writing medium. The invention is characterized by a secondary separation zone located in the inner free space between the upper and lower walls and the primary separation devices. In an alternative embodiment, multihop packets are assigned a higher QoS value. Accordingly, temporary stop of the charge pump circuit can be prevented even when the boosted potential exceeds in a pulse-like manner the reference potential at the vicinity of the output node of the charge pump circuit, and the boosted potential can be rapidly restored to the reference potential.