▶Superior Sound Quality -- The BOYA BY-XM6 is a 2.4GHz adaptive frequency hopping wireless lavalier microphone system, consists of two transmitters and one receiver. ▶Wireless Distance -- Long Operation Distance --- BOYA wireless microphone BY-XM6 uses the 2.4Ghz transmission frequency band and can support up to 328ft of barrier-free transmission distance, and no longer suffers from the trouble of being bound by wires.
eBay