Plantronics Style Poly Headset Splitter and Telephone Audio Cable-Supervisor Agent Training Y-Cord with Mute Button -Compatible with EncorePro, Encore, HW Series for Call Center, Office Training

The images are not what is delivered. There is a "new and improved" version that has a black slide toggle mute instead of the red flip toggle. This new one is awkward to use. It worked as described for radio traffic but when we tried it for phones it would not transmit voice on any of the phones we tried it on regardless of the position of the mute button. There is something preventing it from transmitting voice for phones but it works bypassing this extension. Why "fix" something that is not broken with a lesser product?