Product Name: Language Lab Headset USB Headset Educational Languge Lab Model NO.: SN181 Jack Type: USB Jack Diameter: USB Function: Multimedia, Microphone Usage: Computer Communication: Wired Type: Electret Earphone Color: Black Wire Material: PVC Trademark: Mitechnic Transport Package: 40 Units in One Carton Specification: 63X41X39CM Origin: China HS Code: 85183000 Product Description Headset SN181 USB Language lab headset SN181 has been greatly used in language lab and computer lab all over the world. It is famous for its good quality and good sound. It uses high quality skin for headband and earpad, which can be used for many years. Replaceable earpad on the headset allows for on-site replacement to extend the product lifetime even further. It integrates USB chipset on the blue USB connector, it does not require extra sound card, and it also makes it more compatible with all kinds of PC. It has stereo mix option on the recording device. It also has all kinds of sound effect setting. It can meet different user requirements. SpecificationLoudspeaker diameter: 50mmEarphone sensibility: 112 dB ±3dBImpedance: 100Ω±10%Frequency range: 20-20KHzOutput Power: 20mvMicrophone sensibility:-49db±2dbDirectivity: UnidirectionalWith Stereo mix optionChipset:CM6206Cord Length: 2.0 meterConnector: USB plugWeight: 320g Does not have radio electronic and high frequency units inside.Headset Setting MenuStereo mix optionMain setting MixerEffectKaraoke/Magic VoiceWarrantyTwo year limited warranty. Warranty will not apply if the product has been tampered with, disassembled or damaged by misuse, accident, modification or unauthorized repair.