Introducing the bt h55 wireless headset for excellent sound amp outstanding comfort part of the new bt range of cordless headsets for wireless compatibility with landline and deskphone communications bt39s first range of wireless headsets compliment the bt business phone range and are ideal for use in both home and office environments this new convertible headset can be connected directly to to pstn line deskphone or pc via rj11 or usb connection compatibility with deskphones includ