Features: brand new and high quality The XH-A902 audio preamplifier board uses the op amp chip, which is purer than other similar op amps. Smaller noise floor.It is suitable for a wide range of preamplifier amplification of all audio amplifiers. It has a wide voltage input DC12~30V. Made with high quality electronic components, stable performance, long service life. Adopt high performance NE5532 chip, with low noise and excellent output drive performance. Specifications: Product Model: XH-A902 Supply Voltage: for DC 12-30V Magnification: 5times Chip model: NE5532 Number of Channels: 2CH Package Includes: 1x Audio Preamplifier Board note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.