Features: Ultra low-noise line mixer with 8 inputs and 2 outputs. Each input channel with individual control knobs. And with 2 knobs for adjusting the output . Support MIC or LINE(4CH stereo & 8CH mono) input. Compact size and metal shell, portable and durable. Dual power supply: power adapter(Included) and 9V battery(Not included). Specifications: Color: Black Material: Metal Power Adapter: Plug Connectors: 14" TRS Item Size: 15 * 11 * 7cm / 5.9 * 4.3 * 2.8in Item Weight: 580g / 1.3lb Note: The battery is not included. Package List: 1 * Sound Mixer 1 * Power Adapter()