Features: Brand new and high quality Design for RDK X3 40 PIN interface Using ES7210 high performances four channel coding chip, it can communicate through 12S interface. Using ES8156 high performances decoding chip, it can communicate through 12S interface. There are four silicone microphones on board, which can record four channels at the same time and have better sound quality. Onboards standard 3.5mm headphone interface can play music through external headphones. Support 3D surround and other sound output. Specifications: Material:Plastic Coding chip: ES7210 Decoding chip: ES8156 Control interface: 12C Power supply voltage: 3.3V Size:Approx. 65x56mm/2.56x2.2inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Driver Board