Logitech Wireless Headset H820e Single-Ear Mono Business Headset Digital enhanced Cordless telecommunications (DECT) spectrum wireless connectivity Headset: 6.5 H x 6.8 L x 2 D inches. Base: 5 H x 2.8 L x 3.3 D inches. In-call LED indicator light. Compatible with WindowsVista, Windows 7 or Windows 8 32-bit or 64-bit, Windows 10, Mac OS X 10.7 or higher, Linux, Available USB port, AC power On-boom mute button and mute indicator LED light Intuitive on-ear call controls. Auto Pair by docking Battery type-Lithium ion. Microphone type-Bi-directional ecm. Operating voltage 1.4 to 5.0v dc Untethered and free to roam the office With DECT spectrum wireless connectivity provides an exceptional wireless range of up to 300 feet that wont interfere with Wi-Fi devices Enterprise-quality audio and all-day comfort technology like the acoustic echo cancelation, DSP audio and a noise canceling mic make the H820e ideal for the busiest workspaces Padded leatherette ear pads and headband enable a comfortable feel for all-day use. Get a full charge in just 3 hours, or if you're in a hurry the battery charges to 50% (5 hours of talk time) in just 50 minutes. On-boom mute button and mute indicator LED light