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The power supply is DC5V-15V, the magnification is 5 times (14dB), and the potentiometer controls the sound respectively.
Input and output with 3.5mm connection for easy use
The high current operates amplifier NJM3414A is used, and the output current is 70mA, which can provide good dynamic output.
Two stereo Auditory inputs and four outputs can directly push four earphones or external amplifiers without affecting each
Stereo Auditory Mixer Distributor Selector Switcher 2 Input 4 output 3.5MM Individually Controls Headphones Amplifier