Unique Gomadic Car and Wall AC/DC Charger designed for the Maylong FD-220 GPS For Dummies &ndash; Two Critical Functions, One Great Charger (includes Gomadic TipExchange) Intelligent circuit tailors precise output voltage (including resistor configuration) specific to the Maylong FD-220 GPS For Dummies. This ensures battery is safely and efficiently charged. State of the art, advanced circuitry prevents the Maylong FD-220 GPS For Dummies from being damaged by power surges, overcharging and/or short-circuiting. Broad input voltage range of 12-24VDC and 100-240VAC respectively. Permits charging via vehicle and home outlets worldwide! Provides a unique combination of both a Rapid Car Charger and a Rapid Wall Charger in one light and compact design When used in vehicle charging mode, high quality capacitors and circuit components ensure that charging current will not interfere with FM radio reception.