Discover what a comfortable conversation feels like with the flx70 featuring the flexifittrade system the flx 70 comfortably isolates noise in the left or right ear with or without an earhook a convenient optional lanyard allows you to keep the headset at the ready without keeping it in the ear dsp reduces echo and ambient noise while bluetoothtm 20 ensures compatibility with today39s hottest phones the flx 70 is sennheiser communicationrsquos second generation bluetooth headset