The SMX-30 Stereo/Mono Switchable Video Microphone from Azden is a battery-powered microphone with separate stereo and shotgun-style microphone units that can be switched between mono and stereo recording modes. It can be used to produce pro-quality sound for DSLRs and other compact cameras in applications for interviews, weddings, presentations, and more. PLEASE NOTE: I WAS FORCED TO SELECT RODE FOR A BRAND. THIS SITE DOES NOT HAVE AN OPTION FOR AZDEN MICROPHONES AND DOESN'T LET ME PUBLISH WITHOUT SELECTING SOMETHING. Used lightly. Excellent condition from a non-smoking home.