With this car battery eliminator, you can power the listed two-way radio models directly from your car cigar lighter receptacle. Simply replace your two-way radio battery with this device. Then insert the DC plug into the cigar lighter receptacle in your vehicle. After completing the above, your two-way radio will be powered by the DC voltage from your vehicle. What more is that this battery eliminator has an inbuilt over-voltage protection function to provide extra safe protection for your valued radios.