Poly Savi 8240 DECT 6 USB-A Headset D200 (77P39AA)

Poly Savi 8240 DECT 6 USB-A Headset D200 (77P39AA): All features
Line of sight range up to 590 feet / 180 meters Stay productive with freedom to roam — up to 590 feet / 180 meters line of sight range.
Choice of wearing styles, including the 3-in-1 convertible options Choice of sleek, comfortable wearing styles, including a 3-in-1 convertible option.
Up to 7 hours talk time Get up to 7 hours with single battery.
3-way connectivity base—computer, desk phone, and mobile calls Manage all your calls with a single base that offers 3-way connectivity — computer, desk phone, and mobile.
Conference up to 4 headsets onto a single base Make training and collaboration easy with the ability to conference up to 4 headsets onto a single base.
Voice alerts for mute and out of range status Keep users in-the-know with voice alerts for mute and out of range status.