Wolverine WIOS-5.8 Wireless Indoor-Outdoor 5.8GHz and Bluetooth Dual Band Surround Sound Twin Speakers (Gray) Wireless Indoor-Outdoor Twin Speaker to enjoy music throughout your house, in the yard, on the patio, by the pool, and even on your boat One of a kind - combining 5.8GHz wireless frequency for long-range reception and Bluetooth connectivity Expandable System - up to 6 additional Speakers Virtual Surround Sound Weather resistance for outdoor and indoor up to 200 Feet Range