"The Rio Car Player doesn't have an internal amplifier, but provides quad 4V line outputs for connection to a standard external amp, available from any car audio dealer. The outputs are driven by a Philips ICE DSP with integral 16-bit DACs feeding a Burr Brown pre-amp stage."
You need an amp to run this thing... But as any car-audophile will tell you, you should never use a head units internal amp
Also, it doesn't have an AM/FM tuner built in. You neeed to buy it if you want that functionality.