Alead Nolan MICRX2 Bluetooth Wireless Microphone and Receiver Set, Long Range, Low Latency, Clarity Sound for Real time Teaching, webinar, Conference, PA Systems, Hearing Impairment, Voice Recording Bluetooth wireless voice solution with both microphone and receiver units capturing the source of voice and delivering spoken word wires sly with clear sound quality The low latency, 0.02s (10x less than other Bluetooth solutions) to minimize lip-sync, audio lag and echo issue. Good for real time presentation, speech , education, teaching, video recording and remote hearing aids Universal TRRS 3.5mm, 4-pole rings, audio jack offer the extra compatibility with iPads, iPhones, Samsung Galaxy Notes, tablet, Android smartphones, camcorder and the most of speakers, PA systems and recording devices. Long range distance operation up to 20m(66 ft) is good for class room, ball room, meeting room, office, home, outdoor and remote listen systems. Integrated with a rechargeable battery to provides up to 6 hours of talk time operation. The lightweight with clip for wearing and using convenient.