Single Ear Corded Office Call Center Headset with 4-Pin RJ9 Quick Disconnect Connector cord for most Analog and VOIP desk phones. Ayaya, Nortel, Shoretel, Polycom, Cisco. The comfy single-ear design keeps you connected with your callers as well as what's going on around you Flexible and adjustable ear pieces not only rotate but the newly designed earpieces also swivel giving you maximum comfort. The included direct connect cord connects directly to many corded office phones without the need for an amplifier 2 Year Full replacement Warranty 10 ft total length on cord for a more full range of movement