Srliya Headphone Amplifier 4 Channel Audio Power Amp Board Module Independent Volume Control 100‑240v (US Plug 100-240V)

4 CHANNEL INDEPENDENT VOLUME CONTROL KNOBS: Input is a 3.5mm jack and a jack, output for 4 stereo 3.5mm jack PORTABLE AND SIMPLE: The product is compact, easy to carry and place, and the is simple and easy to understand. Each hole and knob has its own operating instructions INDEPENDENT AMPLIFICATION: Each channel of the HA4 headphone splitter is equipped with an excellent op amp core and volume control potentiometer, subtly amplifying the of each channel without any interference MULTIPLE CONTROLS: Support control master volume, master mute, input source selector, and 4 channel volume STRONG PC: Adopt PC material, scratch , possess strong heat , great toughness, drop , strong impact , good dielectric properties and insulation