... 4bm Using the broadcom 2042 main chip, with bluetooth2.0 Interface Using the Bluetooth industry leading software solutions, WIDCOMM BTW (Microsoft ... ,Windows Mobile6.0 or Symbian S60 smartphone operating system compatible. Receiver sensitivity:-75bm (standard) up to 4bm, low radiation Modulation: ... ,Tangkeng Village,Shiyan Street,Bao'an District,Shenzhen,China518108 wireless bluetooth numeric keypad