Shark Shklxyj450-black 4" Motorcycle Atv All in One Audio with Led Light 100w / Alarm / Usb / Sd in Black Built-in 2x50W amplifier with MP3 player Built-in FM radio, Radio Frequency range 87.5--108MHz Built-in SD card slot 1 pair 4" waterproof harley speaker, 50W 12V DC power supply,for 12 Volts motorcycles, scooters and yachts. USB cable to play MP3 & charge mobile phone Motorcycle alarm function LED light on the speaker, flash with the music playback RMS power @8 50WX2 Frequency response 20Hz-20kHz Wireless remote controller, Remote distance 30m