Feature:1. 2 IN 1 OUT: Stereo sound signal mixer board module mixes stereo two way sound inputs into one stereo output, which can directly drive headphones or power amplifiers.2. AMPLIFIER: Stereo sound signal mixer board module uses the NJM3414 low voltage, high current operational amplifier. The power supply is DC 512V, and the amplification is about 2 times.3. 3.5MM INTERFACE: Sound signal mixing board module has a 3.5mm headphone interface, which can directly drive headphones or connect to an amplifier. Potentiometers control the volume of each channel separately and do not affect each other.4. CURRENT: The quiescent current is about 8ma, and the maximum drive current is 70ma, which can easily drive various headphones and external amplifiers.5. USE NOTE: Stereo sound mixing board module is easy to use, please use low ripple power supply, sound cable please use shielded wire.Specification:Item Type: Stereo Sound Signal Mixer Board ModuleProduct Material: PCBProduct Size: Approx. 5x4.8cm / 2.0x1.9inPower Supply: DC 512VMagnification: About 2 TimesStatic Current: About 8ma.Package List:1 x Stereo Sound Signal Mixer Board ModuleNote:All data are measured manually, and there are certain errors in the measurement results.