Let us face it. There is already enough stress with international travel than to be worrying about damaging your Sony Walkman NWZ-S616 by using a cheap; mismatched wall charger. Put a 110v charger in a 220v outlet and you risk damage to your device; charger or both instantaneously! Thank goodness Gomadic has taken the worry out of the equation with its unique International Travel Wall AC Charger specifically made for the Sony Walkman NWZ-S616. Designed to not only support wall outlets worldwide; the Gomadic International Wall charger also supports all international voltage levels; thus removing all the guesswork. Built using new; state of the art circuitry in power regulation and distribution; this Gomadic Charger will safely; securely and rapidly keep your Sony Walkman NWZ-S616 charged and ready to go regardless of where you are in the world. Toss in our upgradeable TipExchange Technology and Gomadic Lifetime Warranty and this product really stands alone.