Features: Dual-channel wireless receiver 48 UHF channels Selectable stereo and mono Can be used as a microphone and audio transmission Optional mute function Simple and clear menu Automatic keylock function Monitor the output sound through the headphones (receiver) Continuous operation for more than 6 hours The operating range can reach 100 meters (up to 300 meters without obstruction) The transmitter and receiver are powered by two AA batteries BOYA WM8 Pro is an upgraded two-channel UHF wireless microphone system with simple and clear menus, high-quality sound and stable performance. This product is suitable for a variety of wireless applications such as: Interview, Information Interview (ENG), Audio Field Production (EFP), Film Production, Business and Education Application Scenarios.