Wireless lapel microphone system includes transmitter with belt clip, receiver with camera shoe and tripod mount, Lav microphone and 2 earphones. The 2.4GHz Wireless system features internal boost antennas with 164-foot (50-meter) range. Suitable for YouTube interviews, tutorials, and presentation recordings podcasts. Includes a 1-year warranty and U.S.-based support. Receiver headphone features second isolated microphone to communicate with the transmitter headphone (audio does not pass through to output) No need to stop and replay the tester to make sure your audio is recording properly. Audio input/output: 3.5mm and TRS audio signal cable Transmitter and receiver powered by 2 AAA batteries (not included) providing 4 hrs of runtime.