The BOYA BY-WHM8 Pro is a UHF wireless handheld microphone transmitter, which can work with RX8 Pro or SP-RX8 Pro. Featuring the UHF transmission technology and the optional 48 frequency bands, it's able to work smoothly in a signal crowded scenario. And the BY-WHM8 Pro features a cardioid dynamic capsule that allows it to capture target sound accurately. Meanwhile, users can select the group channel A or B through the easy-to-read LCD display. And like the RX8 Pro, it's also powered by two AA batteries.