The S1204 Satellite Wireless Powered 50-Watt Speaker from AmpliVox Sound Systems features a built-in 16-channel UHF wireless receiver and is designed to provide additional amplification for AmpliVox's S1204-70 speaker kit. It has wireless operation in a range of up to 300-feet. The built-in 50-watt amplifier powers its dual 6x8-inch Jensen designed speakers. The S1204 features a built-in and concealed pocket handle for transport and a 3/8" tripod mount. The S1204 requires an S1204-70 speaker kit for operation.