An electronic article surveillance tag 20 having a metal attaching member 34 located therein and adapted to securely and releasably receive a shaft 52 of a pin therein, whereby a predetermined arcuate probe is inserted through an opening and applies a requisite force to the attaching member 34 to release the shaft 52. The breath tester comprises a circuit board, wherein a sensor, a liquid crystal display, and a processing unit are installed on and electrically connected to the circuit board. The lower limb screwthreadedly receives an adjustable, rotatable self-contained tensioning unit having a variably compressible power coil spring therein.