EAS device with installation switch and activating base

An electronic article surveillance apparatus comprising:

• a housing enclosing electronic components, said housing having a bottom surface, a top surface and at least one side connecting said bottom surface and said top surface, said housing having a first attaching interface, said electronic components comprising a switch extending from said bottom surface of said housing;
• and
• a base, said base having a top surface and a bottom surface, said base having a second attaching interface complimentary to said first attaching interface, said first attaching interface and said second attaching interface facilitating the releasable attachment of said housing to said base with said bottom surface of said housing facing said top surface of said base, said base comprising an aperture located to align with said switch when said housing is attached to said base, said base further comprising a first flexible tab extending into said aperture and aligning with said switch, said first flexible tab being biased to extend past said bottom surface of said base;
• wherein,
• when said base is attached to an article and said housing is attached to said base, said first flexible tab is pushed into said aperture and said switch contacts said flexible tab.