I won this on Ebay for $14.95 but I don't know how well it works (hopefully better than my smoke machine). Has anyone had any experience with this? According to the instructions, it looks as if the unit is made to detect the high frequency emitted by a vacuum leak. There's an ancillary Ultrasonic Emitter that can apparently be used in closed spaces like a trunk or inside a vehicle. I'm looking forward to trying this one.
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