Single, but don't think to purchase it,phone hang, even if you try to call it takes 3 sec to dail "Hi Amar, Galaxy M32 supports Dolby Atoms on wired and wireless earphones/headphones. Hope this is of help. Regards, Samsung India"####[['purchase', 'Buyer Attitude#Recommendable', 'negative'], ['dail', 'Performance#Running Speed', 'negative'], ['Dolby Atoms on wired and wireless earphones/headphones', 'Product Accessories#Headphones', 'positive'], ['hang', 'System#Operation Smoothness', 'negative']]