The NS4871 is a type of audio power amplifier with ESOP8 RoHS manufactured by Nsiway. It is a dual-channel, high-current, power op amp designed for use in audio applications such as amplifiers, crossover networks, active filters, and sound systems. It provides high-power operation up to 350 mA per channel, up to 40 kHz frequency response, and sufficient output voltage and current for many applications. The device is RoHS compliant and has a sleek 8-pin ESOP8 package that helps reduce the PCB space and cost needed to get high-quality sound. The NS4871 is an excellent choice for various audio applications.