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Monster Rockin’ Roller 4MAX | 100W Indoor/Outdoor Portable Bluetooth Speaker, Water Resistant | Up to 25 Hours Playtime, Karaoke Microphone,
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Monster Rockin' Roller 270 Portable Indoor/Outdoor Wireless Speaker, 200 Watts, Up to 100 Hours Playtime, IPX4 Water Resistant, Qi Charger, Connect to Another TWS Speaker (Slate) - Walmart.com
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Amazon.com: Mighty Max Battery 12V 9Ah SLA Replacement Battery for Monster Rockin Roller 4 Speaker : Health & Household
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