Stereo sound: The sound quality of the preamplifier is very good, it can be used for a long time. you can enjoy music without having to worry about noise. Small size: This preamplifier is small in size and light in weight, which can be easily placed in a pocket or backpack without taking up too much space. This circuit can be used when the sound of your device is small when connected to the power amplifier. It is suitable for small audio signal amplification, the amplification factor is 10 times (20db), and the front 3.5mm interface can be connected to headphones; Power supply: DC9-19V (Power supply not included) The amplifier chip is a dual op amp NE5532 Colour: Black material: metal Input and output are 3.5mm ordinary headphone jack and RCA lotus jack TAKE A LOOK!:NE5532 Preamplifier music audio signal Pre amp amplifier 20db gain RCA 3.5MM Headphone phone sound Volume Control dc 12v Preamp: the preamplifier has a preamplifier, which can be used as a preamplifier for your headphones or audio equipment. Variety of uses: preamplifier preamplifier can be used in a variety of applications, such as home, office, bedroom, etc. Compatibility: this preamplifier is compatible with all rca, samsung, huawei, and other popular brands. RELATED INFO: Audio preamplifier ne5532: neodymium preamplifiers are designed with high-quality materials to ensure clear and clean sound, which is great for listening to music. Preamplifier ne5532 gain: the preamplifier can be used to connect your headphone to a preamplifier or amplifier to achieve clear and clear sound quality. Package Contents: 1 x audio signal Pre amp amplifier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.