... Cancelling Direct with RJ11 plug Binaural headphone with RJ11 plug Headset Key Features:1. Acoustic shock protection circuit2. Flexible goose neck mic boom 3 ... , 225, 300, 320, 325, 420, 425, 1100, 1200, 1300, 1400, Paragon 450 I2002, i2004 (not compatible with i2400 phase II and i2004 ...