ONE HEADSET FOR MULTIPLE DEVICES. This office headset comes with RJ9 and 3.5mm connectors for both landline desk phones, cell phones and PC laptops. With 3.5mm connector for iPhone Samsung PC laptop and most other Androids. With RJ9 connector worksfor Cisco IP Phone 7931G 7940 7940G 7941 7941G 7942 7942G 7945 7945G 7960 7960G 7961 7961G 7962 7962G 7965 7965G 7970 7970G 7971 7971G 7975 7975G 6921 6941 6945 6961 7821 7841 7861 8811 8841 8961 9951 and more. | HIGH QUALITY SOUND: Phone headset with noise cancelling microphone and HD audio sound ensure easy and clear communication for call centers, offices and home phones even in noisy environment. Wideband audio solution offers natural and clear hearing. Anti acoustic shock for hearing protection. | SUPER COMFOTABLE HEADSET: RJ9 headset with super soft protein leatherette ear cushion,user-friendly hygiene, adjustable headband to fit for different head sizes, ear cover rotatable,no pain no push to ears for all day long wearing. Microphone arm 330 degree rotable for wearing mic on either side, super call center headset for telemarketing and offices. | GREAT DURABILITY: Light weight and strong design, stainless steel headband, superior quality speaker and microphone, reliable plastic parts. Reinforced cord built with Kevlar to withstand demanding environment and protect against office chair wheels, sharp objects for daily heavy use. Compete with Plantronic and Jabra expensive for great value. | COMPATIBILITY AND WARRANTY: We promise 60-DAY MONEY BACK AND 2-YEAR WARRNATY. Please check in Product Description for compatibility list(including but not limited). If you don't see your phone model listed or come to any issue with our headset, please contact us freely for compatibility guide and aftersale service. We will reply asap within 24hours.