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 Subwoofer/Speaker to TV/PC/CD Player : Electronics
Russound X1-TX8 4-source wireless audio transmitter at Crutchfield
555 IC Wireless Audio Transmitter and Receiver - YouTube
Long Range Bluetooth Audio Transmitter or Receiver for TV PC Stereo, Connect Speaker, Headphones, Phone, aptX Low Latency Wireless Adapter, Listen in HD with No Delay Optical RCA 3.5mm (Home RTX 2.0)