More from Amazon.com : http://www.amazon.com/gp/product/B00H4I5FAQ?tag=purrfectcatdi-20

Canon EOS 70D Digital Camera External Microphone Vidpro XM-L Wired Lavalier microphone - 20'

Vidpro XM-L Wired Lavalier microphone - 20 Audio Cable
Transducer type Electret Condenser
Output Connection 35mm 18 inch 4-Pole Mini-plug - Polar Pattern Omni-directional
Frequency Range 65Hz - 18KHz - SignalNoise 74dB SPL
Sensitivity -30dB - 3dB 0dB 1VPa 1kHz