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Amazon.com: Monster Rockin' Roller 270X 200W Portable Indoor/Outdoor Speaker - Black/Gray : Electronics
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Amazon.com: Monster Rockin' Roller Mini | Portable Bluetooth Wireless Speaker, 60 Watts, up to 36 Hours Playtime, Mic/Guitar Input, IPX4 Water Resistant : Electronics
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Amazon.com: Monster Rockin' Roller 270 Portable Indoor/Outdoor Wireless Speaker - Gray/Black : Electronics
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