Mix Electronic Organ Accompaniment 6.35 Ts 6.5 Mm Jack Bass Mono Microphone 1/4 ?You can connect four devices (microphone, Guitar, Keyboard, instrument, etc.) to a 1/4-inch TS interface, mixing four signal inputs into one signal output TS ?There are volume controls along the way, either to adjust the volume of the instrument you want or to turn it off ?Hifi mixer amplifier, no noise, excellent sound quality, give you endless fun to record ?Size (ft) : 0.35 * 0.18 * 0.1 ?Metal Shell, Matte Texture, anti-skid function at the bottom of the four feet