The M700 is our most popular business headset. A dual-microphone ENC system has the primary mic capture the voice while the secondary mic samples ambient noise and cancels it out of phase. In open-plan offices and contact centres we measure around 60% less perceived noise at the far end. The headband uses a stainless-steel core wrapped in protein leather, and the acoustic chamber is open-backed to avoid heat build-up over long shifts. USB-A, USB-C and 3.5 mm versions are all available so it can plug straight into mainstream softphones and conferencing platforms.