The Grocer first revealed how inventor Howard Stapleton, MD of Compound Security Systems, had launched the pint-sized ear-bashing units at the end of last year (November 5, p12).
At the time, the £495-a-unit invention was only being trialled by a handful of retailers.
But following a blitz of interest and publicity, Stapleton has since taken orders for more than 120 of the units and has been featured on TV and in newspapers globally.
Stapleton said that the latest retailers asking to trial the units included Tesco, which is understood to be looking at the device for One Stop, and Sainsbury, which has bought two for trials at its Bells c-stores.
McDonald’s, Arriva and various councils have also shown interest, said Stapleton, while police in Gwent, South Wales, are said to have reported an 84% drop in call-outs to a Spar store plagued by unruly youths.