Boss Audio Systems MCBK420B is a high-performance Bluetooth-enabled amplified speaker system designed for motorcycles and UTVs. With 600W max power and weatherproof construction, it delivers immersive audio in challenging outdoor environments. Enjoy wireless music streaming from Bluetooth devices and control volume conveniently with the included weatherproof volume control. The system includes high-impact, high-temp speaker enclosures and speaker clamp mounts for secure installation.