1、Good Matching: Able to work with digital amplifier, this preamp module will bring you more listening enjoyment. 2、Practical Use: Enabling simple operation in audio amplification as well as adjustment in high, medium and bass. 3、Dual Channels: Adopting dual core NE5532 chip, the dual channel preamplifier board has high working efficiency. 4、Reliable Work: Works stably under DC 12V-24V, the preamp module allows for better tone control to meet your needs. 5、Easy to Install: Comes with a light weight and a compact size, also has 2pcs connecting cable for installation. 1 x Preamp Module2 x Connecting Cable Item Type: Preamp ModuleMaterial: PCBSupply Voltage: DC 12V-24VNumber of Channels: Dual Channel