The KRK Go Aux 4 is a compact and portable monitoring sound system with a wide range of inputs and connectivity. KRK are manufacturers of world-renowned studio monitoring speakers and the Go Aux 4 is their first-ever condensed all-in-one portable speaker system. With ultimate connective capability the Go Aux 4 has TRS Jack RCA Aux and USB inputs as well as Bluetooth pairing. The four-inch woven glass aramid woofers deliver a warm punchy bass that is bolstered by built-in ABS cabinets and the one-inch soft textile tweeters provide crystal-clear treble. Designed for musicians on the move the Go Aux 4 can be set up effortlessly. The system is powered by a single AC cable that feeds into the speaker that has all the inputs controls and the amplifier and the other speaker is powered by a speaker-level cable. The master speaker has high-frequency and low frequency EQ controls as well as an automatic room correction feature that can be used with the included measurement microphone. This speaker also has a headphone monitoring Aux jack that automatically turns off the Go Aux 4 speakers when in use. The Go Aux 4 comes with two adjustable speaker stands and a nylon carry case. The stands can be used to angle the speakers for optimal monitoring and can be collapsed and packed away in the carry case. The nylon carry case holds both speakers stands and all included cables and accessories. Designed to provide a portable and handy option to musicians and creatives alike the KRK Go Aux 4 is an essential item for monitoring with limited space or on the move.