Air Pods 2 won't connect to MP3 Player YFFiZQ

I cannot hear the music on my MP3 player even though my Apple Air pods 2 say that I am connected (I pushed the connect button in the back for more than 5 seconds. Also, even though I increased the volume, I heard one ear bud tried to connect but no luck . Thank you so much- The MP3 player is a YFFIZQ Digital Player I bought through Amazon. Input:500mA