Description:<br> This is a call center headphone with a noise canceling microphone and the sound quality is very good. There are speaker volume adjustment and mute function. Comfortable to wear, suitable for long-term uninterrupted use. It is the first choice for telephone customer service/telephone sales.<br> <br> Specification:<br> Model: H500D-2.5<br> Material: ABS<br> Colour: Black<br> Plug: single 2.5mm<br> Wearing method: head-mounted<br> Whether wireless headphones: No<br> With or without a microphone: Yes<br> Impedance: 150¦¸<br> Horn diameter: 28mm<br> Headphone cable material: PU<br> Size: 17 x 13 x 5cm / 6.7 x 5.1 x 2.0in (overall)<br> 5 x 5 x 3.5cm / 2.0 x 2.0 x 1.4in (single earplug)<br> 250cm / 98.4in (cable length)<br> Weight: approx. 186g<br> <br> Package List:<br> 1 x Headphone<br> 1 x English Manual<br> <br> <br> <br> <br>