RJ-45 (8P8C) to 3.5mm Plug (3 poles) PRODUCT FEATURES Electronically connects your DECT headset base to your telephone Enables remote operation, answer/end calls, for wireless headset use with various phones, thus eliminating the need for a mechanical handset lifter For use with Panasonic DT543, DT546, NT553, NT556, HDV230 phone models