Model Number: Telephone headset 3230#9028-#6630 Brand Name: Daily Key Specifications/Special Features: Suitable for office, contact centers and IP-phone Acoustic shock protection circuit Ergonomic design, outstanding IP telephone sound and noise canceling microphone Materials: voice tube, ABS and POM Over-the-head wearing style, monaural and binaural versions Comfortable, adjustable metal headband Quick-disconnect function Noise-canceling microphone Voice tube microphone boom arm 330-degree swivel Replaceable soft foam or soft leatherette ear pad