This part is a kind of semiconductor called 57F68.

Function of this product has BlueTunes ROM Stereo Headset Solution.

Manufacturers : CSR

Image and pinout :

Some of the text within the PDF file :

Features ■ ■ _äìÉqìåÉë∆=olj=nck _äìÉqìåÉë=olj=píÉêÉç=eÉ~ÇëÉí=pçäìíáçå Single-chip Bluetooth® v2.1 + EDR System Production Information BC57F687A05 Issue 3 ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Cost-effective single-chip solution for stereo headset and wireless speaker applications A2DP1.2 and AVRCP1.0 profiles enabled with SBC encoder for streaming audio over Bluetooth and for remote control functionality MP3 decoder for improved audio quality and reduced power consumption (MP3 decode functionality requires an appropriate licence from Thomson, see Section 17.1) Configurable A2DP 5-band EQ High-quality audio 95dB SNR on DAC playback 64MIPS Kalimba DSP coprocessor FastStream, CSR’s low-latency codec for video and gaming ap [ ... ]

57F68 PDF Datasheet Download