Sanwa Direct Telephone Headset with RJ-9 Connection, Noise-Canceling Microphone, 8-Channel Switching, Lightweight 102g (Single Ear), 400-HS043

This single-ear headset connects to your telephone's handset jack (RJ-9). Its lightweight and comfortable fit makes it ideal for extended use. It eliminates the need to hold the handset, reducing strain during long calls. The cable features a wiring switch that allows you to choose from eight different wiring configurations to match your telephone. It features a flexible arm that moves freely and a noise-canceling microphone that reduces pickup of surrounding noise. The coiled cable stretches as needed, preventing excess cable from getting in the way. The cable also features a quick disconnect connector. The headband is stretchable, so you can adjust the length to fit your head perfectly.