The tascam dr 70d for dslr and video cameras is a 4 channel professional grade audio recorder with two built in omnidirectional microphones and four balanced xlrtrs mic inputs designed for the aspiring filmmaker this compact recording device is tripod mountable and allows the user to create high quality audio recordings to match the quality of their footage two omnidirectional microphones allow easy recording of natural stereo sound without using external mics used in combination with one