Description: 【Mutiple inputs】 :The Audio mixer allows you to mix various audio signal sources or instruments into a single channel output, including tube amps, electronic keyboards, electronic drums, electronic pianos, MP3 players or phone music. 【4 Channel Audio Mixer】: The 4 Channel Audio mixer provides Ultra compack 4 channels input and 1 channel output line MONO mixer.reverb and other effects can be adjusted to fine tune the music at any time. 【Multi Fuction】: Stereo Mixer Can record high fidelity audio with external recording equipment, convenient tuning, real time recording instant listening,easy to use.Inputs and outputs use 6.35 mm interfaces.Each input has independent volume adjustment and mono stereo conversion switch. 【SIMPLE OPERATION】:Each channel has its own switching button, making it more convenient and intuitive to switch between mono and stereo audio inputs. 【WIDE RANGE OF APPLICATIONS】 The Ultra Low Noise mixer is suitable for mixing most electronic instruments and is widely applicable, mixer suitable for professional stage performance, bands, conference rooms, KTV room, recording studios, bars, live broadcasts and other occasions. Specification: Input - Line: 4 x 1/4" TRS Output - Main: 4 x 1/4" TRS Model MX400 Size Chart: 10.4cmx5.6cmx5cm/4.09inchx2.20inchx1.97inch Package Includes: 1 4 channel stereo instrument mixer 1 EU Plug Note: Please allow slightly errors due to manual measurement and different monitors.