TIC CORPORATION WRS010-SL Outdoor Wireless Rock Speakers (Slate) (Discontinued by Manufacturer) 2 Wireless Rock Speakers 2.4ghz Operation 300ft Max Range 8 Selectable Rf Channels Freq Range: 2,400mhz-2,483mhz Full-Range 100W Drivers 2 Wireless Rock Speakers Analog Audio Inputs Rf: 2400 Mhz - 2483 Mhz Rf Sensitivity: 85 Db