This wired office headset features an RJ9 connector and HD voice quality, suitable for use with various Cisco phone models including 6851, 7945g, 7962g, 8811, 8841, 8845, 8851, 8861, 8961, and 9951 series. It provides clear audio for professional communication. Additionally, a 3.5mm adapter is included, allowing connection to smartphones. The headset is designed for comfortable all-day wear and reliable performance in office environments.