Movo 2.4GHz Wireless Lavalier Microphone System for Canon EOS 80D, 77D, 70D, 60D, 50D, 7D, 7D Mark II, 6D, 5DS, 5D, 5D Mark IV, 1D, Digital Rebel SL1, T7i, T6s, T6i, T5i, T4i & T3i DSLR Cameras Includes Transmitter with Belt Clip, Receiver with Camera Shoe/Tripod Mount, Lavalier & 2 Earphones 2.4GHz Wireless system features internal boost antennas with a 164-foot (50-meter) range Frequency response: 35 Hz - 14 kHz Audio input/output: 3.5mm Transmitter and receiver are each powered by two AAA batteries (not included) which provide 3.5-4 hours of runtime