Nowhere does it come with mentioned for the product description or PDF data sheet the fact that device requires 12 volts DC (VDC) to 18.5VDC within the satellite receiver to function, wedding ceremony product package states this. An additional source power source, the amplifier won't work and often will likely get rid of your signal. This is very much the grounds for the negative product evaluations. If you are not by using a satellite receiver that feeds 12-18.5VDC inside the amplifier, then make use of an amplifier that accompanies a power supply, for example , Motorola 484095-001-00 Signal Booster. (Since penning this, Amazon revised the information details to include an electrical source statement at my request.)