High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles!The VS-AT4 and VS-AT4-EL are Italian minimum metal blast resistant anti-tank blast mines. The VS-AT4 uses a blast resistant mechanical pressure fuze, while the VS-AT4-EL uses a programmable electronic pressure fuze with an integral anti-lifting function.The electronic fuze in the VS-AT4 has an active life of between one hour and one year which can be set in one hour increments, at the end of which the mine will either self-destruct or disarm itself.