The RetroSound Apache is the most technologically-advanced radio ever made for your vintage 1955-59 GMC or Chevrolet Truck, and also the only with built-in Bluetooth connectivity for hands-free phone calls and wireless audio streaming. The new Apache features a 32,000 color display to customize your radio to your truck's interior. A single USB port for flash drive plus two standard auxiliary inputs are included. The Apache has a built-in 25 watts x 4 channel power amplifier as well as front and rear RCA pre-outs, that would allow you to add external amplifiers. It mounts seamlessly into your Chevrolet/GMC truck thanks to RetroSound's patented InfiniMount adjustable bracket system.