Features: brand new and high quality 10 channels can be input at the same time, 2 channels can be output at the same time, or one of them can be selected. The output port can drive headphones, also can be connected to other audio equipment such as amplifiers. The voltage is between DC5V-12V, quiescent current of 5V power supply is 270ma, and the 12V power supply is 103ma, and the magnification is about 2 times (6db). It uses a total of 13 imported dual operational amplifiers. built-in power boost conversion module ensures the isolation of the channel, the signal is large and dynamic without distortion, perfectly restores the sound, and has strong driving ability. OUT1/OUT2: It is the audio output of the 3.5 interface, which can be linked to the interface at the music input of the active audio or power amplifier. CH1, CHL2, CH3, XH4, CH5, CH6, CH7, CH8, CH9, CH10: are the audio input of the 3.5R interface, which can be input at the same time, or one of them can be selected. Each channel has a volume adjustment knob. The ten-way input volume can be independently controlled, and the volume can also be completely turned off. Specifications: Type:Audio Signal Mixer Board Colour: Black Material: Metal Package Includes: 1 x Mixer Board 1 x Charging Cable note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!