Both the volume controller and microphone are fixed to the cable Noise reducing microphone ensures your voice is easily understood for clear conversations Over-head style headphones with adjustable headband Over-ear foam ear cups - Performance Certification REACH Country of origin China Plug and Play Yes Adjustable headband Yes Refurbished No Backlight No Cable colour Black Cable length 1.8 m Volume control Rotary Product colour Black Headset type Binaural Recommended usage Office/Call center Wearing style Head-band Product type Headset Ports & interfaces Bluetooth No USB connectivity No 2x 3.5 mm connectors Yes 3.5 mm connector Yes Connectivity technology Wired Headphones Driver unit 2.7 cm Headphone sensitivity 105 dB Impedance 32Headphone frequency 20 - 20000 Hz Ear coupling Circumaural Microphone Microphone type In-line Weight & dimensions Weight 220 g Packaging data Package type Box Package weight 82.5 g Package height 233 mm Package depth 57 mm Package width 153 mm Packaging c