Monster Bluetooth Speaker
A portable Bluetooth speaker from Monster for picnics, patios and road trips.
You save $41.60 at Walmart
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The Monster S310 is a portable 30W Bluetooth speaker with Bluetooth 5.2, a built-in mic, and IPX6 water resistance. It can pair with a second S310 for 60W true stereo with separate left and right channels. Monster rates the rechargeable battery at up to 24 hours at moderate volume. It suits outdoor use and buyers who want a loud, low-cost 30W speaker, though it is Bluetooth only and its small cabinet limits bass next to larger rivals.
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