: Depending on your usage frequency, the M1 PA system wireless mic system can provide continuous operation for 5-8 hours, making it perfect for extended performances, on-site interviews, and live shows. 20 : The M1 portable wireless mic system offers 20 frequency channels for you to choose from, allowing you to use up to 20 sets of M1 devices simultaneously without interference. It is suitable for scenarios with multiple speakers, singers, or performers. 48 : Whether you use a dynamic microphone or a condenser microphone, the M1 UHF wireless microphone can provide stable signal transmission. With the included XLR to 1/4 and 1/4 to 1/8 adapters, it is compatible with various setups, such as active PA systems, monitors, DJ mixers, pedals, sound processors, and more. - : The M1 wireless XLR transmitter and receiver utilizes ultra-high-frequency UHF transmission technology, providing robust anti-interference capabilities and an exceptionally wide frequency response range, ensuring stable and clear sound delivery to the audio-receiving device. 164 : The STRICH M1 wireless microphone system liberates your wired microphone from traditional cables, enabling a wireless transmission range of 50 meters / 164 feet(30 meters / 100 feet with obstacles). It also supports long-distance volume signal adjustment, allowing you to control the volume remotely.