RJ-12 (6P6C) and 3.5mm plug to RJ-45 (8P8C) and RJ-9 (4P4C) 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 Alcatel 4028EE, 4038EE, 4068EE, phone models