1. Extended Control Range Equipped with a 7 band equalization circuit with a control range of ±12dB and multi frequency equalization bands, our home audio equalizer delivers incredibly precise audio settings. Built with TI or ST Original TL074 for a audio experience. 2. Durable Construction Our digital equalizer is crafted from robust aluminum alloy, offering strength, corrosion resistance, and stability. Powered by a DC 5V 12V supply, it supports dual channel sound output. 3. Headphone Compatibility This versatile graphic equalizer features an ear amplifier based on the NE5532. It can effortlessly control all types of headphones with adjustable highs and lows. 4. Versatile Interface Our equalizer includes a 3.5mm input interface supporting 4 pin plugs for flexible use. The output connects to headphones with a microphone, enabling standard voice call functions on mobile phones.