This is a 120V AC power supply for use with 6V Wilson Cell Phone Amplifiers. The converter transforms 120V AC power from a standard home outlet to 6V DC, so you can use your mobile amplifier in home. This may also be used in vehicles which have an AC power supply. Only for use with 6V amplifiers: All of the in-home and large building amplifiers are 6V. As are the 801201 kits, 801230 Mini-SignalBoost kits and the 804013 iDEN kit. All other amplifiers require a 12V DC Adapter.