Welcome to our store！</br> 1、CONTROL RANGE: The 7 band equalizer circuit has a control range of ±12dB. equalization bands: 60Hz, 150Hz, 400Hz, 1KHz, 3KHz, 6.5KHz, 15KHz, by TI or ST TL074. 2、BASIC PARAMETERS: 7 band sound equalizer preamplifier gain, 4580 classic op amp provides 5x amplification (14dB); input impedance is 20K, output impedance is 600Ω. 3、COMPATIBLE HEADPHONES: The ear amplifier part of the sound equalizer consists of NE5532 type 47 headphone driver circuit, easy to drive various types of headphones, adjustable high and low, with sound cable. 4、3.5MM INTERFACE: 3.5mm input interface supports 4 pole plug, the output terminal connects to a headset with microphone, which can be used for normal voice calls on a cell phone, and the other terminal has a Qunlian interface for choice. 5、ALUMINUM ALLOY MATERIAL: The 7 band car sound equalizer is made of aluminum alloy, high strength, stable performance, DC 5‑12V power supply, dual channel sound. <div class="wang-edit-text"><p class="wang-edit-text"> <p class="wang-edit-text"> <p class="wang-edit-text"> Item Type: 7 Band Equalizer Product Material: Aluminum Alloy Color: Black Plug Voltage: 100‑240V Power Supply: DC 5‑12V Interface Specification: Approx. 5.5x2.1mm / 0.2x0.1in Equalization Circuit Control Range: ±12db Equalization Band: 60HZ, 150HZ, 400HZ, 1KHZ, 3KHZ, 6.5KHZ, 15KHZ <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> </div> 1 x Equalizer 1 x Adapter 1 x Sound Cable Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>