... )2.4Ghz wireless 2)high performance, nice design 3)rock shaped, popular Characteristics of FY Series Outdoor Wireless Acoustic Product ... , can be used outdoor and indoor3.Accessory: Rock transmitter, remote control, rock speaker AC adapters, audio cable, RCA type ... is specialized in various of speakers over 10 years, including rock speakers, lawn speakers, wireless speakers, bluetooth speakers, in- ...