... 1)2.4G wireless technology 2)rock shape,ornament 3)waterproof Product ModelFYS021WL Frequency Range2400-2483MHz Receiver Sensitivity89dBTransmitter Power<10mw Voltage ... used outdoor and indoor3.Accessory: Rock transmitter, remote control, rock speaker AC adapters, audio cable, RCA type audio cable, AC ... as MP3, CD, DVD and IPOD, IPHONE. Garden Decoration Colorful Waterproof Wireless Resin Rock Speaker