This part is a kind of semiconductor called 57F68.

Function of this product has CSR57F68.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

Peng'R Tel:13590282537 0755-83611011 QQ:1825598678 Website:www.chenbingdom.com --------------------------------------------------------------------------------------------------------------------------------------------CSR57F68 57F68 CSR BLUECORE5 57F68 PDA 57F68 Bluetooth V2.1+EDR GFSK, 1Mbps, 0.5BT Gaussian Battery voltage VDD:3.3 supply OPP,OBEX,SPP,A2DP, AVRCP,FTP ,HS/HF,DUN Profiles 30mA <0.4mA -40ºC to +80ºC 10 CLASS2 4dBm -80dBm@0.1%BER 2.4GHz-2.480GHz PIO, SPI Speake Microphone High acoustic fidelity sound 75dB 0.01% 25.01X21.02X1.8MM Free Datasheet http://www.datasheet4u.com/ --------------------------------------------------------------------------------------------------------------------------------------------- Free Datasheet http://www.datasheet4u.com/ ------------ [ ... ]

57F68 PDF Datasheet Download