Easy to use: Plug and play, with a well-shielded, compact structure, small size, and generous appearance. | High quality audio: The control circuit board design and amplifier design reduce noise for better sound quality. | Long-range stereo broadcasting: The 15W mode offers a long-range stereo broadcasting transmission distance of 3-4 km (1.9-2.5 mi) in the open air. | Wide application: Ideal for church, outdoor church services, outdoor parking lot service, worship services, drive-in movies, concerts, meetings, the whole house, and Christmas light displays.