Feature: 1. 4 In 1 Out: Stereo mixer that mixes four sound inputs into one stereo output. Each potentiometer controls the volume of each channel independently, and the volume does not affect each other. 2. Easy To Adjust: Stereo mixer splitter has standard switch gear. With bass and treble controls, you can adjust settings to your needs and easily drive a variety of headphones and external amplifiers. 3. Standard Design: Stereo splitter can directly drive headphones or connect power amplifier, the interface is 3.5mm stereo jack. The shell is made of high quality aluminum alloy, which is sturdy and durable. 4. Input And Output Compatibility: Sound extractor input interface is compatible with PC, mobile phone, laptop, etc. The output is compatible with speakers, headphones, bar speaker and more. 5. Safe: Working power of the mixer is DC 5V‑12V DC5.5 x 2.1, and the magnification is about 2 times. The quiescent current is about 8mA. Using NJM3414 low voltage and high current, the maximum driving current is 70mA. Specification: Item Type: Stereo Mixer Material: Aluminum Alloy Color: Blue Working Voltage: DC 5V-12V Features: It can directly drive headphones or connect to a power amplifier, and the interface is a 3.5mm/0.1in stereo jack.. Package List: 1 x Stereo Mixer