Does the LS40 feature Bluetooth


No, the LS40 does not feature Bluetooth technology.  It works with mobile devices via the included 3.5mm cable.  Simply connect one end of the cable to the headset and the other end to your device.  Make sure that the LS40 is powered OFF and you'll be able to enjoy audio from your device and use either the boom mic or integrated mic for calls/chat.  Volume/mute controls on the headset will not function, but the left ear button can be used to control music or answer/end calls.  The advantage here is that you never have to worry about battery life when using as a mobile headset.