.The NS4165B is an Audio Power OpAmps ESOP8 RoHS manufactured by Nsiway. It is an operational amplifier that is designed to be used in AC powered audio systems. It offers high output power, low distortion, and low noise performance. The opamp is built in an 8-pin ESOP package and is compliant with the RoHS directive for the reduction of hazardous substances. The NS4165B is designed to be used in audio amplifying systems such as soundbars, sound receivers, audio-visual amplifiers, and speakers. It is also suitable for integration into other consumer electronics products such as speakers, amplifiers, and microphone preamps.