The Sennheiser SC 635 Mono USB and 3.5mm Corded headset aka ‘The Century’ is Sennheiser’s premium USB (for computer) and 3.5mm (for mobile/tablet connections) ultra noise cancelling (UNC) mono headset. It’s designed to be used with Computer, tablet and mobile phone that use a USB and 3.5mm jack . The SC635 headset has an over the head wearing style, with rotatable microphone for left or right hand side wear.

Features
– Natural listening experience- With Sennheiser Voice Clarity
Perfect speech output – Ultra noise-cancelling microphone
Outstanding sound quality – High-quality neodymium speaker
High-quality durable design – Brushed aluminum and stainless steel components
Exceptional wearing comfort – Large leatherette ear pads for all day comfort and powerful sound
Personal fit – Extension headband with number indications for accurate adjustment
Brushed aluminum parts for strong and lightweight design

Manufacturer: EPOS
https://www.eposaudio.com/en/us/enterprise/products/sc-635-usb-headset-1000643
Manufacturer SKU: 1000643
Months warranty: 12