4CH x 50W max power with 2 pairs of RCA pre-amp outputs (front, rear) and a subwoofer let you hook up additional components to expand your golf cart radio for loud and natural sound. The work power of the boat headunit is DC 12V WIRELESS AUDIO STREAMING: This marine media player with advanced Bluetooth 5.0 technology, you could directly connect and wirelessly stream favorite music from your smart devices like phones, iPad, tablet, MP3 player and apps like Spotify / Pandora. Enjoy tons of musical contents on land or out on the water with range of up to 10 Miles stable Bluetooth signal 3 INCH HD DISPLAY WITH FULL GLASS SCREEN: The round boat radio with front HD 1024600 TFT color display, you can enjoy an immersive and clear viewing experience even in broad daylight MULTI-COLOR BUTTONS & ROTARY KNOB: Big backlight LED buttons make it easy to navigate and decorate the dash to match the relax atmospheer, enhancing the visual appeal. The physical knob let you fast access volume function on this UTV stereo AUX-IN & USB VIDEO PLAY: The RCA Aux-in can be used to play the audio from ipods, smartphone and MP3 player. The rear USB port available for up to 64GB flash drive, offering more options for music and movie enjoyment in the vehicle.