Sandberg MiniJack Headset Bulk is a simple, stylish headset with a MiniJack connection. Can be connected directly to a smartphone or PC. Adapter for 2-connector connection included. The headset is ready for use immediately.PerformanceProduct type:Headphones Wearing style:Head-band Plug and Play:Y Recommended usage:Office/Call center Colour of product:Black Headset type:Binaural Cable colour:Black Ports & interfacesConnectivity technology:Wired 3.5 mm connector:Y USB connectivity:N Bluetooth:N HeadphonesHeadphone frequency:20 - 20000 Hz Ear coupling:Circumaural Impedance:32 Ω Acoustic system:Semi-open Driver unit:4 cm Headphone sensitivity:38 dB MicrophoneMicrophone input impedance:2200 Ω Microphone direction type:Omnidirectional Microphone frequency:30 - 20000 Hz Microphone type:Boom Microphone sensitivity:-42 dB Detachable microphone:N Number of microphones:1 Packaging contentQuantity:1 Packaging dataPackage width:120 mm Package depth:20 mm Package height:140 mm Package weight:110 g