Product Description Theater Solutions by Goldwood B43GR Fully Wireless Powered Bluetooth Rock 4 Speaker Set240 Watts of fully wireless rechargeable battery power with Absolutely NO WIRES!Newest Bluetooth Technology lets you pair to the first speaker and wirelessly link up to 99 more B43GR speakersSimply pair your phone to the first speaker and link as many speakers as you want with the touch of a buttonDurable and Weatherproof against rain, snow, salt, ice, pool chemicals and moreSpeakers have Deluxe 4 inch Polypropylene woofers with Butyl Rubber surroundsWoofers are angled 20 degrees upward to direct sound to listeners60 Watts total system power per speakerSealed re-chargeable battery play time is 6 hours at standard volume and charges in 7 hoursFrequency response is 40Hz-20 kHz with 88dB sensitivity at 8ohmThe Slate Grey cabinets are multi-layer composite and silicone sealed with rust resistant steel grillsPowered Bluetooth rock speakers are (H x W x D) 8.86" × 9.45" × 7.87" eachSystem RequirementsAny Bluetooth audio streaming deviceStandard US 110V Grounded Wall Plug for chargingApplicationsBack Yard Décor and EntertainmentPatios or DecksPool and Garden AreasSpa SettingsBusiness / Office Outdoor DécorWhat's in the boxes4 Battery Powered Bluetooth Rock SpeakersDC to USB Battery Charge CablesInstruction Manual