This product is a turntable preamp, which is made of durable iron, ABS and electronic component material, with good texture, safe and practical. Easy to install and use, it can be easily applied to your turntable. It is a very practical accessory that will meet your needs well. Features -Color: Black -Material: iron, ABS, electronic components -Size: 10.30X5.70X3.00cm/4.05X2.24X1.18in -Note: comes with . Connector: 1/4 inch TRS Power supply: DC 12V Power Adapter: Input 220V 50/60Hz Output 12V 500mA - It adopts the latest DC 5V power supply method, which no longer restricts application scenarios. - Considering that the signal of the phonograph is relatively weak, our company has added a set of gain adjustment on the input and output, so that the volume of the phonograph can be played perfectly - This preamp has stereo input and stereo output. Connect the turntable to the input and ground, then connect the amplifier receiver to the output - With level and volume control knob, converts phono signals to line level signals - Note: Please use a better shielded cable (not included), otherwise hum, noise, etc. will occur Package list: 2 x Phono Preamp 1 Adapter