Features STANDARD JACK: With 3.5mm headphone socket, the potentiometer controls the volume of each channel independently without affecting each other. EASY OPERATION: This stereo audio mixer supports plug and play, no power required, convenient and durable, with good practicality. 4 IN 1 OUT: The 4-way stereo audio inputs are mixed into a 1-way stereo output, which can directly drive the headphones or connect to a power amplifier. ALUMINUM SHELL: The audio mixer adopts a sturdy aluminum alloy shell, which is corrosion resistant, has strong anti-interference and lossless signal. HIGH CURRENT: The rest current is about 15mA and the maximum driving current is 70mA, which can easily drive various audio equipment. Specification: Item Type: Audio Mixer Product material: ABS, aluminum alloy Sleep current: 15mA Maximum operating current: 70mA Working Power: DC 5-12V Package List: 1 x Audio Mixer Package List 1 x Audio Mixer