CardioSens Ultra II has aggressive adhesive. Fast signal stabilization with rapid defibrillator recovery and superior conductivity. Strong adhesive membrane for difficult situations. Can capture ECG signals quickly for fast and accurate results . Unique high conductive backing and synthetic gel for more first time ECGs, drastically reducing the need for retakes. A new tab shape designed to twist with the cable, not lift the electrode Longer shelf life, up to 2 years from date of manufacture. Quality and performance guarantee.