This part is a kind of semiconductor called BA6104.

Function of this product has LED Level Meter Driver.

Manufacturers : ROHM Electronics

Image and pinout :

Some of the text within the PDF file :

Audio ICs LED level meter driver, 5-point, linear scale BA6104 The BA6104 is a monolithic driver IC for LED level meters applications. The IC has five comparators that operate in equally-spaced steps in response to the input voltage, and drive bar-display output LEDs. When the reference voltage generator is not set (pin 7 open), the comparators operate in 200mV (approx.) steps, so an input level of about 1V lights all of the LEDs. By connecting external resistors between pin 7 and GND. and pin 7 and VCC, this level can be adjusted over the range 0.5V to 3.0V. DataShee FApplications Signal meters, tuning meters and voltage checkers. FFeatures 3) The input level at which all LEDs light can be set in 1) Drives an LED bar display in proportion to the input c [ ... ]

BA6104 PDF Datasheet Download