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If you don't have some type of home theater audio system you can easily add external speakers. there is no bluetooth connectivity on this model from Optoma. On the back of the projector there is a standard headphone style jack. that is stereo audio out. From there you could hook in a Soundbar or other surround sound system using the 3.5 mm audio out jack and converting the stereo sound to L&R RCA connections.
Sorry, there was a problem. Please try again later.I actually bought this for indoor use. Also bought a regular sound system to work with it. I would not know anything about outdoor use. Sorry
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