This part is a kind of semiconductor called JRC2904.

Function of this product has NJM2904.

Manufacturers : New Japan Radio

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Some of the text within the PDF file :

NJM2904 SINGLE-SUPPLY DUAL OPERATIONAL AMPLIFIER ■ GENERAL DESCRIPTION The NJM2904 consists of two independent, high gain, internally frequency compensated operation amplifiers, which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. Application areas include transducer amplifiers, DC gain blocks, and all the conventional op amp circuits, which now can be more easily implemented in single power supply systems. For example, the NJM2904 can be directly operated off of the standard +5V power supply voltage, which is used in digital systems and will easily provide the required interface electro [ ... ]

JRC2904 PDF Datasheet Download