1WIDE CONTROL RANGE: 7 band sound equalizer adopts seven band equalization circuitry with a wide control range for flexible adjustment of sound effects. 2IMPROVE SOUND QUALITY: Preamplification gain provides powerful sound amplification to enhance sound quality. 3PREMIUM PERFORMANCE: 7 band car sound equalizer adopts headphone driver circuitry to drive all types of headphones, providing superior sound experience. 4MULTIPLE INTERFACE SUPPORT: The car sound equalizer supports multiple input and output interfaces for easy connection to various devices. 5ALUMINUM ALLOY MATERIAL: Car sound equalizer is made of premium aluminum alloy, which is sturdy and durable, and also has excellent heat dissipation performance. 1 x Sound Equalizer 1 x Charging Cable