Buy FS-CT6B RF 6 Channel 2.4Ghz Transmitter Receiver for ...
XY-WB - module with 2.4GHz transmitter and receiver - Kamami on-line store
Amazon.com: YMOO 2.4Ghz Wireless Audio Transmitter Receiver for TV,192kHz/24bit HiFi Audio,20ms Ultra Low Latency,320ft Long Range RCA Jack Wireless Adapter for Active Speaker to TV/PC/Home Theater/Party/Game : Electronics