The OSA Professional Wireless Lavalier Microphone is a compact and portable microphone set that is perfect for video recording, vlogging, YouTube, and other activities. It features a hidden microphone that provides clear recording effects and minimizes external noise interference. The device uses SDP Chip + ANC Noise Reduction technology for high-quality sound. With a range of up to 165 feet, it can cover long distances indoors or outdoors. The microphone set includes two mini Bluetooth microphones with 40 hours of battery life and one plug two chargers for convenience. It is compatible with all iPhone systems, iPads, and iPhones with lightning interface. Overall, this professional wireless microphone set is suitable for various activities such as video recording, live broadcasting, podcasts, and singing recording.