Savi W440 Convertible Headset Ideal for users in campus-like business environments and remote workers requiring premium sound quality and portability Advanced wideband audio using CAT-iq technology for high definition voice quality Noise-canceling microphone Enhanced Digital Signal Processing (DSP) provides more natural sounding voice DECT technology eliminates interference from WiFi networks SoundGuard Digital protects against sound levels above 118 dBA Style: Convertible monaural, behind-the-head, or over-the-ear Certified for Skype for Business and Optimized for Microsoft Lync Connects to PC and Mac via USB adapter One-touch call answer/end/flash, volume up and down, and mute controls from the headset Corded or Cordless: Cordless DECT 6.0 Wireless Range: up to 300 ft Talk Time: up to 7 hours (unlimited with hot-swappable battery, purchased separately) Package Includes: USB adapter, USB charging cable, base power supply, charger base, headset, behind-the-head headband, over-the-head headband, battery, fit kit, carrying case Plantronics Part: 203947-01 Replacement USB Adapter: D100 (83550-01) Standard Charging Cradle: 84599-01 FFit Kit with earloops, earbuds, and foam cushions: 84604-01 Replacement Over-the-head Headband: 84605-01 Replacement Behind-the-head Headband: 84606-01 Leatherette Ear Cushions: 87229-01 Deluxe Charging Cradle: 84600-01 Deluxe Charging Cradle Kit: 84601-01