IMPACT SC 668 506495 IMPACT SC 668 is a premium dual-sided wired headset optimized for narrow-band desk phones. It features Easy Disconnect. Specifications: Colour Black with silver Wearing style Headband, binaural (dual-sided) Impedance ~200 ohm Connector Easy Disconnect Frequency response (microphone) 150 Hz – 6,800 Hz (Wide-band) Frequency response (headphones) 150 Hz – 12,000 Hz Microphone Ultra noise-cancelling Max. sound pressure level 110 dB limited by ActiveGard® Cable length 1m Weight 111g Speaker type Neodynium Magnet Speaker Included in the box: Headset Quick guide Safety guide Leatherette ear pad Carry Pouch and cable clip mounted on headset