Headset Buddy Male Headset Plug to RJ9 Male Audio Cable for Amplifiers (25M-RJ9M) Adapts phones with 2.5mm headset jacks to wired amplifiers or wireless headset stations Simple to use with most devices, amplifiers, and wireless base stations Connect Jabra Wireless Headset to Phone with 2.5mm Headset Input Professional-grade High-quality wiring for extra durability and superior audio quality 1 year warranty on all Headset Buddy products