Great bluetooth transmitter: connector issues

This is a GREAT long-range bluetooth transmitter, which I use to go to my Anker Sound Buds Life that I wear to allow sound boost for me alone, while others in the room use the speakers driven by the TV set at a lower sound level. My only issue: the product description led me to assume the Avantree could be fed sound directly from two cables with RCA jacks. In fact, it has only a 3.5mm jack and is only supplied with a 3.5mm to RCA adapter cable that has female connectors, whereas male are needed. Luckily, I had a usable cable in by junk box.

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