... ,Windows Mobile6.0 or Symbian S60 smartphone operating system compatible. Receiver sensitivity:-75bm (standard) up to 4bm, low radiation Modulation: ... bluetooth speaker, bluetooth mouse, Bluetooth dongles,Pager, pager system, 3G wireless modemcell phones, Bluetooth keyboard for ipad and iphone 4, etc ... Tangkeng Village,Shiyan Street,Bao'an District,Shenzhen,China518108 wireless bluetooth numeric keypad