Used a few times. Operation confirmed. The condition is subjective and is a used item, so please refrain from purchasing if you are concerned about minor details or are very sensitive. Please purchase only if you understand. The GO:MIXER PRO-X is a mobile device-only portable mixer that can handle everything from live streaming and music video production to web conferences and online lessons. It's a compact mixer that can mix 7 sources, including condenser microphones and headset microphones, and output them digitally to a smartphone in high quality. It can be used not only with the video editing app "4XCAMERA" but also with live streaming platforms such as "Facebook Live," "Instagram Live," and "17LIVE," as well as online lesson platforms such as "ZOOM Cloud meetings." For applications that require long hours of operation, such as live streaming, it can be powered by 4 AA batteries, and when powered by batteries, it can also be used as a standalone small mixer. ● Audio mixer for mobile devices, palm-sized ● Equipped with up to 7 audio inputs for microphones, instruments, etc. ● Equipped with an XLR/TRS combo jack that supports 48V phantom power ● Guitar/bass input terminal with a pad switch that also supports input from active pickups ● Instrument input terminal that supports both stereo and mono inputs ● Two TRS mini jacks that support line input ● Mini headphone jack that supports headset microphones ● Loopback function convenient for playing along with backing tracks from mobile devices ● Two connection methods: USB Micro-B terminal and 4-pole TRRS jack ● Includes three connection cables: Lightning, USB Type-C, and 4-pole TRRS ● Operates on power from a smartphone or 4 AA batteries ● Easy to combine with camera apps and live streaming apps ● Ideal for use with Roland Zenbeats and other mobile music production apps ● External dimensions (width x depth x height) 104x155x41mm