The Yealink UH34 Lite Binaural USB Wired Headsets has the following features; •   Plug-and-play – USB connectivity to Yealink IP phones, includ- ingT41S/T42S/T46S/T48S/T42U/T43U/T46U/ T48U/T53/T53W/T54W/T57W/T58A/VP59 (T41S/ T42S/T46S/T48S should be upgraded to version 82 or higher) •   HD Voice/Wideband speaker performance •   Noise-canceling microphone and passive noise cancellation •   ActiveProtection technology safeguards users from acoustic injury •   Integrated LED indicator and warning tone •   330° bendable boom arm for easy adjustment without breaking