Canon EOS Rebel T3I Digital SLR Camera External Microphone Vidpro XM-L Wired Lavalier microphone - 20' Audio Cable - Transducer type: Electret Condenser XM-L Wired Lavalier microphone - 20' Audio Cable Transducer type: Electret Condenser Output Connection: 3.5mm (1/8 inch) 4-Pole Mini-plug - Polar Pattern: Omni-directional Frequency Range: 65Hz - 18KHz - Signal/Noise: 74dB SPL Sensitivity -30dB +/- 3dB / 0dB = 1V/Pa, 1kHz