Bought two of these for each of my kids' costumes. For reference, I used them to do a basic outline around a 6-yo and 8-yo average sized kids, and the 15 ft length was enough to do so (though it did run a tiny bit short on the 8-yo one). On the high-pitch noise, it seems to vary from battery pack to battery pack. I lucked out with no having no sound at all, the other one having a subtle high-pitch noise. Since it's basically a gamble on what you get, I ended up just keeping the one with the noise.
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