These are better there CALLED thunder B .they use them in Airsoft games .Set up one or two of these and your thief will think twice about a return trip:
They are about 5 bux on eBay and you will need some spider wire and shotgun primers. Most of these require you to drill the hole out slightly to 1/4" so the primer will fit.
CO2 flash bang there really is no flash .
BUT THERE IS ONE HELL OF A BANG