Police are searching for two men who threatened a woman with a shotgun and a Taser stun gun at her home in east London.
They pretended to be delivering a television set to Fieldwick House on Retreat Place, Hackney, last month.
But when the woman answered the door, they forced their way in, pushing the Taser into her stomach and demanding money.
They escaped a few minutes later with taking anything.
Scotland Yard has issued e-fit images of the two men wanted for aggravated burglary.
Both are described as white and between 5ft 8in (1.72m) and 5ft 10in (1.78m) tall.
They were aged between 25 and 35 and wore dark clothing when they threatened the woman, at about 1045 BST on 22 May.