Yealink USB Wired Headset Stereo USB Wired 32 Ohms 20 Hz 20 - - - - - - kHz.

T41S/T42S/T46S/T48S/T42U/T43U/T46U/T48U/T53/T53W/T54W/T57W/T58A/VP59 (USB connection to Yea IP Phone including T41S/T42S/T46S/T48S needs to be upgraded to version 82 or version) USB connection with Yealink IP phones including T41S/T42S/T46S/T48S/T42U/T43U/T46U/T48U/T53/T53W/T54W/T57W/T58A/VP59 (T41S/T42S/T46S/T48S phones must be upgraded to version 82 or higher.) [New/Unopened] Our store is the official domestic primary distributor of Yealink headsets. We only sell genuine new products. In the unlikely event that the product is damaged or worn, we will replace it. *We do not provide technical support. Thank you for your understanding. *In the event of an initial defect, we will replace the product. *We cannot accept returns of opened products other than for malfunctions. *Please pay close attention to the product information and specifications before purchasing. ・Connect to Yealink IP phone via USB USB connectivity with Yealink IP phones including T41S/T42S/T46S/T48S/T42U/T43U/T46U/T48U/T53/T53W/T54W/T57W/T58A/VP59 (T41S/T42S/T46S/T48S phones must be upgraded to version 82 or above.) Integrated LED indicators and audible alerts - Active Protection technology protects users from acoustic damage -HD sound quality/wideband speaker performance Noise cancellation - 320° adjustable boom arm makes it less likely to break