Zum Eco-Set - USB/DECT 6.0 Low-Emission Wireless Headset + Base with up to 500 feet of Range Extra Padded and Flexible, lightweight Ear Hanger for ultra all-day Comfort Wireless Range up to 500 feet from base. Full USB Voice for PC or MAC Calls - Lync/Skype & VOIP calls 9 hours of talk time long battery life; Noise-cancelling Mic Secure DECT 6.0 Protocol - using Eco-DECT technology for low emissions Deskphone and Softphone Use Dynamic Power Adjustment means lowest level of emissions based on distance from the base station. Light, Flexible over-the-ear style for all-day comfort. 9 Hours of talk time. Noise canceling microphone reduces background noise. Consultation hold function. Conference call up to three callers. &#034;Out of range&#034; indication. Range up to 500 feet (150m) - Secure DECT 6.0 Protocol. Adjustable reception volume. Full USB Voice for PC or Mac calls. Optimized for Microsoft Lync, Skype for Business, Skype, and other VoIP platforms. Use with Electronic Hookswitch or Remote Handset Lifter (RHL-201) to answer and end calls remotely (both sold separately). Super-smooth, contoured ear loop Great Balanced feel on your ear 3 included ear tips fit nicely into all ears Enhanced stability and comfort for all-day use