Physio-Control LIFEPAK CR2 AED Adult/Child QUIK-STEP 4-Year ElectrodesProduct Description This Physio Control LIFEPAK CR2 Adult Child QUIK STEP 4 Year Electrodes package includes an electrode cover, one set of adult pediatric pads, and replacement instructions. The electrodes have a shelf life of four years. Designed for use with the Physio Control LIFEPAK CR2 AED. Key Specifications For Use With Physio Control LIFEPAK CR2 Shelf Life 4 Years Size 13. 34 x 8. 89 cm (5. 25 x 3. 50 in) Lead Wire 1. 1 m (42 in)