AC / DC Adapter For Plantronics 81423-01 Charger Savi Office Wireless Headset System 81423-01 Power Supply W440 83359-01 W440-M 400This adapter with DoE Level V from FITE ON is approved for Sale in the US and Canada by Underwriters Laboratories (UL) and Got the certificates. With short circuit protection,over-current protection, over-voltage protection, overload protection, over temperature protection.You just spent less time charging, then will get a longer standby time for your device, saving energy and protecting environment.The most important is, it will neither do harm to your family, nor your device!☛Package Includes:*1 x AC / DC Power Adapter