Features: brand new and high quality 6 channels can be input and mixed output at the same time, there are 2 output interfaces that can be connected to two audio amplifiers or other audio equipment, and the volume can be adjusted independently. 6.5m large two-core interface, which can be connected to a microphone or musical instrument, with a magnification of about 5times (14db). Support mono/stereo switching, can form mono six-in and two-out or stereo three-in and one-out. Built-in lithium battery, it can be used continuously for about 30 hours when fully charged. The charging interface specification is 3.5x1.35, and it can be charged with a USB cable. 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!