The Mackie CR4 Reference Multimedia Monitor Speakers are designed for studio use and provide high-quality sound output. They feature 50W of power, an active system, a 4-inch woofer, and a 0.75-inch tweeter. The speakers also incorporate Bluetooth technology allowing wireless connectivity with all kinds of mobile devices including smartphones and tablets. The system also accepts wired input via 1/4-inch and 1/8-inch RCA cable.