3.5mm Male to 2 Female Jack Separator Cable for Headphones Speakers Black 40cm REF1929. 1 x 3.5mm Male to 2 Female Jack Separator Cable for Headphones Speakers Black. This headphone adapter allows you to listen to music from a single device with 3.5mm jack output to 2 headphones, headphones, speakers with 3.5mm jack connector.
eBay