A man, 23, was hit in the face during a robbery in Mersea Road, Colchester.
Three men approached the victim near to Willows Newsagent, at around 10.40pm, on November 23.
The suspects hit the victim before stealing his headphones.
The men were white, described as being aged between 18 and 20-years-old.
One of them had short hair, a moustache and a goatee beard, and was wearing a green and dark blue hoodie.
A second suspect had short hair and freckles.
Anyone with information is asked to call Pc Claire Jennings at Colchester CID on 101, or Crimestoppers on 0800 555 111.
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