This part is a kind of semiconductor called UPC2002H.

Function of this product has Audio Power Amplifier.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

********** AUDIO POWER AMPLIFIER - FRONT VIEW - w w at .D w aS e e h U 4 t .c om 1 UPC2002H IL11 + 4 2 – NON INVERTING GND INPUT (3) (1) INVERTING INPUT (2) VCC (+8 to +18 V) (5) OUTPUT (4) w w w t a .D S a e h U 4 t e .c m o w w w .D a t a e h S 4 t e U m o .c [ ... ]

UPC2002H PDF Datasheet Download