1.The product is made of high-quality materials with guaranteed quality 2.AD828 is an improved version of NE5532, with much better performance than the NE5532 power amplifier module 3.Single power supply, dual purpose, more convenient to use 4.The separated version of Potentiometer is easy to install, and is not limited by the spacing between casings 5.Small size design, power amplifier chip adopts AD828 The AD828 power amplifier module is an improved version of the NE5532 module in 2023, which addresses the issue of insufficient positive and negative power supply current. The new version has poor dynamic performance and more stable current. Single power supply, the tone board adopts a fever grade operational amplifier AD828, made with , small size design, and dual use of AC and DC. Color: Red Material: PCB+Metal Package Contents: 1 x Preamp Amplifier Board 2 x cable 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.