This part is a kind of semiconductor called BH1415F.

Function of this product has Wireless Audio Link IC.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

BH1415F Audio ICs Wireless Audio Link IC BH1415F The BH1415F is a FM stereo transmitter IC that transmits simple configuration. The IC consists of a stereo modulator for generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air. The stereo modulator generates a composite signal which consists of the MAIN, SUB, and pilot signal from a 38kHz oscillator. The FM transmitter radiates FM wave on the air by modulating the carrier signal with a composite signal. !Applications CD changer, Car TV, Car navigation, Wireless speakers, Personal computer (sound board), Game machine !Features 1) It is possible to improve the timbre because it has the pre-emphasis circuit, limiter circuit, and the low-pass filter circuit. 2) Built-in pilot-tone system FM stereo mod [ ... ]

BH1415F PDF Datasheet Download