... Cancelling Direct with RJ11 plug Earphones Direct with RJ11 plug Headset Key Features:1. Acoustic shock ... , 4620, 4621 5410, 5420 5610, 5620 DT1, DT3, DT5 Cable & Wireless: CWB 100H, CWB 200H, CWB 500, CWB 600 Comdial: 8312 ... 4 (2-line) Uniden: 420 and 450Telephone headset FOR600 photo: Earphones Direct with RJ11 plug