Hello,
I took BT module from my old notebook Lenovo TP SL400. But I don't know, how to connect it with Arduino. Modul has special conector and I can't find any documentation. BT module: BCM92046MD_LENO
These notebook modules often connect to the PC over the USB bus although using a special proprietary connector. You probably cannot use this module with an Arduino but there are lots of BT modules available for use with an Arduino.