Features 1、Pretty Sound: Equipped with NE5532 chip, this audio preamplifier board ensures better sound quality with little noise. 2、Dual Channel: Dual channel output enables more music enjoyment on the speaker, which is very convenient and reliable. 3、Stable Works: Support DC12‑30V wide voltage input, the preamp module will work with high efficiency and reliability. 4、Wide Utility: Allows for flexible application in the amplification of all audio, and has 5 times amplification as well. 5、Easy to Install: Designed to have a light weight and a compact size, the simple installation can be quickly finished. Specification Item Type: Audio Preamplifier Board Product Model: XH-A902 Chip Model: NE5532 Number of Channels: Dual Channel Amplification: 5 Times Power Supply: DC 12-30V Product Size: Approx. 50 x 30 x 15mm / 1.97 x 1.18 x 0.59in Installation Size: Approx. 43 x 23mm / 1.69 x 0.91in Diameter: 3mm / 0.12in Package List 1 x Audio Preamplifier Board