Advanced 7Band Audio Equalizer with Headphone Amplifier Precise Sound Control: Features 7band equalization with a control range of ±12dB across multiple frequency bands, allowing detailed audio adjustments to suit any listening preference. Uses original TL074 chip from TI or ST for audio quality and stable performance. BuiltIn Headphone Amplifier: Includes an integrated NE5532based ear amplifier with a type 47 headphone driver circuit, capable of driving all types of headphones with adjustable and low output levels for clear and balanced sound. Versatile Input and Output: Equipped with a 3.5mm input interface that supports 4pole plugs, ideal for connecting devices such as smartphones or laptops. Output is compatible with headphones that include a microphone, enabling normal voice call functionality for mobile use without sacrificing audio quality. Durable, Compact Build: Constructed from strength aluminum alloy for durability and stability, designed to withstand regular use. Operates with a DC 5V to 12V power supply and provides dualchannel stereo sound. Use Scenarios: 1. Finetune music playback from your home stereo or PC for sound in any room or environment. 2. Connect to your smartphone for enhanced headphone audio and clear voice calls during online meetings or gaming. 3. Improve sound balance for live audio mixing or DJ setups with quick, precise adjustments across seven frequency bands. Designed for users who demand flexibility, reliability, and quality sound performance in both home and portable applications.