This is a great marine grade amp. Extremely efficient amp designed for motorcycles and side by sides but they also work great on classic cars too. It has rca input like a normal amp but also has Bluetooth so you can run this amp without having to have a stereo, you can use your phone as the source Comes with bass knob pictured all unused and unopened This amp is small in size 5.5x5” can easily fit this inside your motorcycle fairing or inside the dash of your classic car. Under the seat, in a saddle bag. No problem 350 watt rms when bridged 175 watt rms x 2 @ 2ohms 125 watt rms x 2 @ 4 ohms I also have custom made wiring kits as well Feel free to make me an offer Thank you