Brand Suckoo 8 channel 6.35mm TRS or 3.5mm 2RCA HiFi Audio Mixer Headphone Amplifier Splitter 3 in 8 out 4 out Mixer Controller For Cell Phone Computer External 8 way Audio Headphone Sound Amplifier Black. This 3 in 1 mixer headphone amplifier is very practical with external 6.35mm TRS or 3.5mm audio jacks for connecting 3 audio input channels (6.35mm TRS + 2RCA + 3.5mm). Distributing 1 of the audio input signals to the (4 x 6.35mm TRS + 4 x 3.5mm) external headphone outputs allows up to 8 people to listen to the same source at the same time, with the external 8 port headphone amplifier providing individual control of volume level and amplification gain. Inputs: 3 way (6.35 mm TRS or 3.5 mm or 2RCA) for instruments, guitars, microphones, mobile phones, computers, MP3 players with 1 way or mixed 3 way input audio. External inputs: 4 way 6.35 mm + 4 way 3.5 mm audio for headphones, amplifiers, speakers and other devices. Colour: black, product dimensions: 14x9.6x4 cm. Accessories: 1 piece of this product + 1 free DC adapter. This mixer external 8 channel (4 way 6.35mm + 4 way 3.5mm) headphone splitter can be individually controlled for volume level gain, you can mix 3 inputs or 1 of them as needed, and comes with a DC switch and mute switch control to meet different users' needs. This is very useful for music production, studio performances or multiple viewers. Overall, this mixer headphone amplifier 3 into 8 out is a powerful, convenient and practical audio device, which can help you achieve the mixing switching distribution of audio signals and volume adjustment amplification gain function.