I have a Shure SM58 (wired XLR), a Shure PGA58 (wired XLR), a ~$25 wireless mic, two ~$60 wireless mics (shared receiver), and an XLR transmitter and receiver. All the mics are tested by connecting them to a Behringer 1202F mixer, then to an amplifier and speakers.I rate the wired SM58 with an XLR connection at 100 points, and the wired XLR PGA58 at 80 points.I connect my SM58 to this wireless adaptor. The XLR wireless adapter performs poorly and produces a lot of noise. Even when the transmitter and receiver are turned on without connecting a microphone, there’s noticeable noise. Additionally, its XLR connector is not compatible with the SM58 or PGA58, and cannot be locked. At $150, the price is clearly too high, as the performance is similar to the ~$25 wireless mic (even when connected to the SM58). So, I give it 1 star.