Wiistar MINI HDMI audio splitter (HDMI TO HDMI+AUDIO)
Brand Name:wiistar
Model Number:h-h
Gender:Male-Male
Connector A:HDMI
Connector B:HDMI,SPDIF,COAXIAL,EARPHONE
(A=in, B=out)
Same adapter at different store reported by Josip Bašić in a comment on Udo Nallog's fb post: