PERFECT FIT - Plug and Play integration into OEM original factory fitted stereo including automatic turn on and off BEST UPGRADE - Highest power plug and play micro amplifier on the market with efficient low power consumption SYSTEM EXPANDER - Easy connection and remote turn on function to add additional amplifiers for more channels and power. A great starting point to build your car audio system. IMPROVED SOUND QUALITY - Adding amplified power to your system in the form of our POWERBOX65.4M allows speakers to be driven effectively and smoothly for better sound and less distortion. BEST VALUE - Low price does not mean low quality. This simple addition gives performance well exceeding its price tag. The best price per performance plug and play amplifier on the market