View on LOZ Suggested Retail: $349.99. TESTED, WORKS.. 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. The Rockin' Roller 270 has up to 200 watts of power making the perfect portable speaker for indoor or outdoor events! Never worry about battery life! With up to 100 hours of playtime the Rockin' Roller 270 will last through any event or weekend trips on a single charge! Charge your wireless devices on the built-in Qi charger. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.