Amazon.com: 3.5mm to 2 RCA Audio Speaker Y Adapter Cable for Google Chromecast Audio RUX-J42 : Electronics
Setting Up Your Streaming Devices: The New Google Chromecast Manual - Gearbrain
Amazon.com: HDMI to RCA Cable, HDMI to RCA Converter Adapter Cable, 1080P HDMI to AV 3RCA CVBs Composite Video Audio Supports for Amazon Fire Stick, Roku, Chromecast, PC, Laptop, Xbox, HDTV, DVD :
What's in the box? - Chromecast Help
Best Buy: Google Chromecast Audio Black RUX-J42
What are the 3 compatible audio cables for Chromecast Audio? and why it matters? - All About Chromecast
SANOXY 12 ft. 3.5 mm Mono Male to RCA Male Audio Cable CBL-LDR-SR102-1112
Best Buy: Google Chromecast Audio Black RUX-J42
3.5mm To 2 RCA Audio Speaker Y Adapter Cable For Google Chromecast Audio RUX-J42 | eBay