[ PH400 Headphone Amps]: Amplifies sound and features four independent volume control output ports and a mute button. It provides a wide volume range, clear sound, and low distortion. [Mono/Stereo Mode]: Guitar headphone amp has a mono/stereo switch that allows you to flexibly select options to meet different needs in various situations. [3.5mm/6.35mm Headphone Jacks]: Headphones amplifier is equipped with 8 non-interfering headphone jacks. 4 x 3.5mm (1/8 inch) headphone jacks and 4 x 6.35mm (1/4 inch) headphone jacks. [7-Color Breathing Light Buttons]: When adjusting the volume, you can see 7 different colors of breathing lights, enhancing the atmosphere. [DC 12V 2A Secure Power Input]: in-ear amplifier is equipped with a reliable 12V power supply, ensuring stable and efficient power delivery while ensuring optimal safety. Color: White Material: ABS Package Contents: 1 x Stereo Headphone Amplifier