SC 45 USB MS 507083 SC 45 USB MS is a single-sided, wired headset with both 3.5 mm jack and USB connectivity - certified for Skype for Business. Specifications: Wearing style On-ear, single-sided (monaural) headband Connector 3.5 mm jack and USB Frequency response (microphone) 150 Hz – 6,800 Hz (Wideband) Frequency response (headphones) 60 Hz – 16,000 Hz Microphone Noise-cancelling Max. sound pressure level Limited by ActiveGard® Cable length 2.5 m (from headset with 3.5 mm jack + detachable USB cable) Weight 102g Speaker type Neodynium Magnet Speaker Included in the box: Headset with 3.5 mm jack, foam ear pad and leatherette cover Detachable USB cable with in-line call control Carry pouch Quick guide Safety guide