Jabra BIZ 1900 Mono. Brand New Includes Two Year Warranty. The Jabra BIZ 1900 Mono features noise cancelling capabilities eliminating unwanted background noise. This headset delivers professional performance and exceptional value and comes with Quick Disconnect plug for immediate connectivity to a wide range of amplifiers and telephone. It increases agent productivity and performance and features 270-degree rotation that supports left and right wearing style. It has a great sound quality with traditional narrowband phone systems. This headset is light in weight having a sturdy design and is exceptionally durable with future proof design.