The Sandberg USB+RJ9/11 Headset Pro Mono is of outstanding quality and can be used for, e.g. your home office, workplace or studying. The microphone is on a flexible arm, which ensures that the other person can hear you clearly. A speaker in one ear provides you with clear sound reproduction, while the other ear is free to hear what's going on around you. The discreet lightweight construction with a soft ear pad and adjustable headband provides you with optimal comfort. Built-in max. volume of 118 db to avoid damage to your hearing. Connects through a USB, RJ9 or RJ11 port and works immediately. Features: 3in1 USB, RJ9 & RJ11 Light weight Crystal clear voice reproduction Perfect for online meetings Specifications: Dimensions: H:0.0 x W:0.0 x D:0.0 cm Guarantee:60 Months Model Number: 126-31